NATIONAL INSTRUMENTS CORP /DE/
10-K, 2000-03-23
COMPUTER PERIPHERAL EQUIPMENT, NEC
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-K

(Mark One)
|X|  Annual Report  pursuant to Section 13 or 15(d) of  the  Securities Exchange
     Act of 1934
For the fiscal year ended:  December 31, 1999
                                       OR
|_|  Transition Report pursuant to Section 13 or 15(d) of the Securities
     Exchange Act of 1934

For the transition period from ____________ to ____________
                              Commission File Number 0-25426

                        NATIONAL INSTRUMENTS CORPORATION
             (Exact name of registrant as specified in its charter)

- --------------------------------------------------------------------------------
            Delaware                                         74-1871327
(State or other jurisdiction of                           (I.R.S. Employer
 incorporation or organization)                        Identification Number)
- --------------------------------------------------------------------------------
  11500 North MoPac Expressway,
         Austin, Texas                                          78759
 (address of principal executive                              (zip code)
            offices)
- --------------------------------------------------------------------------------

       Registrant's telephone number, including area code: (512) 338-9119
- --------------------------------------------------------------------------------
        Securities registered pursuant to Section 12(b) of the Act: None

           Securities registered pursuant to Section 12(g) of the Act:
                         Common Stock, $0.01 par value
                       (Title of Class)

      Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's  knowledge,  in definitive proxy or information  statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ]

      Indicate by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes X No .

      The aggregate market value of voting stock held by  non-affiliates  of the
registrant  at the close of business on February  22, 2000,  was  $1,050,618,097
based upon the last sales price  reported  for such date on the NASDAQ  National
Market System.  For purposes of this disclosure,  shares of Common Stock held by
persons  who hold more  than 5% of the  outstanding  shares of Common  Stock and
shares held by officers and directors of the  registrant as of December 31, 1999
have been  excluded in that such  persons may be deemed to be  affiliates.  This
determination is not necessarily conclusive.

      At the close of business on February 22, 2000,  registrant had outstanding
50,112,483 shares of Common Stock.

                       DOCUMENTS INCORPORATED BY REFERENCE

      Part I and Part III incorporate  certain information by reference from the
definitive  proxy statement for the Annual Meeting of Stockholders to be held on
May 9, 2000 (the "Proxy Statement").


<PAGE>

                                     PART I

      Certain  information  required by Part III is omitted  from this Report in
that the Registrant  intends to file a definitive  proxy  statement  pursuant to
Regulation  14A  with  the  Securities  and  Exchange   Commission  (the  "Proxy
Statement")  relating to its annual meeting of  stockholders  not later than 120
days  after  the end of the  fiscal  year  covered  by  this  Report,  and  such
information is incorporated by reference herein.

ITEM 1.   BUSINESS

      National Instruments Corporation (the "Company" or "National Instruments")
is a leading supplier of  computer-based  instrumentation  hardware and software
products that engineers and scientists use in a wide range of industries.  These
industries are spread across a large and diverse market for test and measurement
("T&M") and industrial  automation  ("IA")  applications.  The Company  provides
flexible  application  software and modular,  multifunction  hardware that users
combine with  industry-standard  computers,  networks and the Internet to create
computer-based measurement and automation systems, which the Company also refers
to as "virtual instruments."

      A virtual  instrument is a user-defined  measurement and automation system
that consists of an industry standard computer or workstation  equipped with the
Company's user-friendly application software, cost-effective hardware and driver
software.   Virtual   instrumentation   represents  a  fundamental   shift  from
traditional  hardware-centered   instrumentation  systems  to  software-centered
systems that exploit the computational,  display,  productivity and connectivity
capabilities   of  computers,   networks  and  the  Internet.   Because  virtual
instruments exploit these computation,  connectivity,  and display capabilities,
users can define and change the functionality of their instruments,  rather than
being restricted by fixed-functions  imposed by traditional  instrument vendors.
The  Company's  products  empower  users  to  monitor  and  control  traditional
instruments,   create  innovative   computer-based   systems  that  can  replace
traditional  instruments  at a lower cost,  and develop  systems that  integrate
measurement functionality with industrial automation.  The Company believes that
giving users  flexibility to create their own user-defined  virtual  instruments
for an increasing  number of applications  in a wide variety of industries,  and
making such  computer-based  instruments  portable between computers,  operating
systems,  and via the Internet shortens system development time and reduces both
short- and long-term costs of developing,  owning and operating  measurement and
automation  systems,  and improves  efficiency  and  precision  of  applications
spanning research, design, production and service.

      The Company is based in Austin,  Texas and was incorporated under the laws
of the State of Texas in May 1976 and was  reincorporated  in  Delaware  in June
1994. On March 13, 1995,  the Company  completed an initial  public  offering of
shares of its Common Stock.  The Company's  Common  Stock,  $0.01 par value,  is
quoted on the NASDAQ National Market System under the trading symbol NATI.

Industry Background

     Engineers and  scientists  have long used  instruments  to observe,  better
understand and manage the real-world phenomena,  events and processes related to
their  industries  or  areas  of  expertise.  Instruments  measure  and  control
electrical signals, such as voltage,  current and power, and physical phenomena,
such as temperature, pressure, speed, flow, volume, torque and vibration. Common
instruments include voltmeters, signal generators,  oscilloscopes,  dataloggers,
spectrum  analyzers,   cameras,   and  temperature  and  pressure  monitors  and
controllers.   Instruments   generally  perform  three  basic  functions:   data
acquisition and control; data analysis; and presentation of results. Instruments
are  used  pervasively  in  research,   education,   manufacturing  and  service
applications in numerous fields including  electronics,  automotive,  aerospace,
telecommunications,  medical  research  and  pharmaceutical,  semiconductor  and
petrochemical.

      Instruments and systems are used to facilitate research as well as product
design, production and service. In research and development settings, scientists
and engineers use  instruments  and systems to collect and analyze  experimental
data and  simulate  manufacturing  processes  or  techniques.  In  manufacturing
environments,  engineers  use  instruments  and  systems  to test and verify the
proper  operation of the products being  manufactured and to monitor and control
the manufacturing machines and processes.  In service contexts,  instruments and
systems are used to monitor, troubleshoot and repair products and processes.

                                      -2-
<PAGE>

      Traditional Instrument Applications for Measurement and Automation

      Instrument  applications can be generally categorized as either T&M or IA.
T&M applications  generally  involve testing during the design,  manufacture and
service  of a wide  variety  of  products.  IA  applications  generally  involve
automating the machinery and processes  used in the production and  distribution
of a wide variety of products and materials.

     A typical T&M instrument is a stand-alone  unit that has input,  output and
analysis capabilities;  knobs, switches and push buttons for user operation; and
gauges,  meters or other displays for visual data  presentation.  Traditionally,
most T&M instruments  were  vendor-defined,  fixed-function  devices designed to
address specific  applications.  As a result,  users had limited  flexibility to
adapt their instruments to changing  requirements.  In the 1960's, vendors began
to incorporate integrated circuits, including programmable microcontrollers,  to
increase  instrument  flexibility.   In  the  mid-1970's,  the  General  Purpose
Interface  Bus ("GPIB" or "IEEE 488") was  developed as a standard  interface to
connect  instruments to external computers.  The first computer  controllers for
GPIB instruments were based on proprietary hardware architectures.  In the later
1970's,  some  minicomputers  with general purpose but complex operating systems
were  equipped  for GPIB  instrument  control.  In the  early  1980's,  personal
computers  with limited  processing  power  equipped  with  MS-DOS,  a standard,
character-based operating system, began replacing minicomputers as the preferred
platforms for instrument control applications.  In the 1990s, personal computers
with Windows operating systems and graphics-based  application  software grew in
popularity   and  became  the  dominant   platforms   for   instrument   control
applications.

     IA systems have long included mechanical devices, analog gauges and meters,
and since the 1960's,  have also included  electronic  instruments  such as data
loggers and strip chart recorders. In the 1970's, programmable logic controllers
("PLCs"),  special-purpose,  proprietary stand-alone industrial computers,  were
introduced  and were used primarily for  "discrete"  manufacturing  applications
such as automobile  assembly.  PLCs have  traditionally  had primitive  operator
interface  panels  incorporating  buttons,  lights and indicators.  In parallel,
sophisticated   instrumentation   systems  called  distributed  control  systems
("DCSs") were also adopted to provide computer control of large-scale continuous
processes,  such as those found in oil refineries.  DCSs integrated a variety of
sensors and control  elements  using both  analog and digital  connections,  all
controlled  by  a  central  computer  running  proprietary   software.   In  the
mid-1980's,  when industrial PC-based IA systems came into use, another approach
became  available.  These early  PC-based  systems  generally  ran  proprietary,
vendor-defined  software and  incorporated  plug-in data  acquisition  boards or
interfaced  to PLCs.  In the 1990's,  Ethernet  networks grew in popularity as a
standard for  connectivity  between IA devices,  instruments,  and systems,  and
personal  computers with high speed  processors  running Windows based operating
systems and graphics-based  application software grew in popularity as platforms
for supervision and control of IA systems and applications.

      Limitations of Traditional Approaches to Instrumentation

      Instruments and systems for both T&M and IA applications have historically
shared  common  limitations,  including:  fixed,  vendor-defined  functionality;
proprietary,  closed  architectures that were generally difficult to program and
integrate  with other  systems;  and inflexible  operator  interfaces  that were
usually  cumbersome  to operate and change.  These  problems  have been  further
complicated  in  IA   applications   because   specialized   data  transfer  and
communications  standards have not evolved rapidly or been widely  adopted.  For
example, PLCs, while greatly improving control of individual processes,  created
multiple  "islands of information"  that were generally unable to communicate or
share  data  with  other  systems   throughout  the  manufacturing   enterprise.
Furthermore,  proprietary  instrumentation  systems have traditionally been very
expensive,  with IA system prices ranging as high as several million dollars and
T&M instrumentation  system prices often ranging in the hundreds of thousands of
dollars. In addition,  the limitations on programmability of traditional systems
means that adopting these systems to changing requirements is both expensive and
time consuming, and users are often required to purchase multiple single-purpose
instruments.

      Although  desktop  computers  in the 1980's  typically  were based on open
architectures,  until the  1990's  they  have  lacked  higher-level  application
software  development  tools and intuitive  graphical user interfaces  ("GUIs").
Consequently,  the process of creating  intuitive operator interface and control
panels was difficult and  expensive.  These early desktop  computers also lacked
the power to rapidly  process and analyze the volume of data  characteristic  of
many high data rate T&M and IA applications. In addition, desktop computers were
difficult to network reliably until standard network  operating  systems evolved
late in the decade. For all of these reasons,  users and vendors were relatively
slow to incorporate desktop computers in their instrumentation systems.

                                      -3-
<PAGE>

      In the 1990's,  desktop and portable computers  improved  significantly in
data and graphics  processing  power,  storage and  communication  capabilities,
user-friendliness  and  reliability.   Nevertheless,  users  accustomed  to  the
flexibility,  efficiency,  power and open architecture of these later-generation
computers,  and the highly evolved  application  software available for business
computing  needs,  have been generally  frustrated in their efforts to integrate
these computers into instrumentation solutions.  Standard desktop computers were
not  equipped  with the hardware  connections  required to control many types of
instruments and lacked  instrumentation-specific  application development tools,
including GUI development  environments.  Neither standard programming languages
such as C/ C++ and Visual Basic,  nor operating  systems such as Windows,  Linux
and UNIX, are "measurement  aware." Without the aid of  instrumentation-specific
software  to  facilitate  the  integration  of  various  instrumentation  system
capabilities  and components,  engineers and scientists could not easily utilize
the full  potential  of  computers,  networks  and the  Internet  to meet  their
measurement and automation requirements.

The Company's Approach to Measurement and Automation

     The Company  pioneered a new  computer-based  approach to  measurement  and
automation called virtual instrumentation in 1986 when it introduced its LabVIEW
application software, which is a graphical programming environment that empowers
users to easily build their own  computer-based  instruments and systems to meet
their specific measurement and automation needs. While a traditional  instrument
bundles the data acquisition,  analysis and presentation  functions in a single,
stand-alone  unit,  a "virtual  instrument"  consists  of an  industry  standard
computer or workstation  equipped with the Company's  user-friendly  application
software,  cost-effective hardware and driver software that together perform the
functions of  instruments.  By  unbundling  the key  instrumentation  functions,
virtual  instruments  represent  a  fundamental  shift  from   hardware-centered
instrumentation   systems  to   software-centered   systems   that  exploit  the
computational, display, productivity and connectivity capabilities of computers,
networks and the Internet.  The  Company's  application  software  products give
users the power and  flexibility  to define,  implement,  modify and control the
core data acquisition,  analysis, and presentation functions of instruments with
their computer. Users can mix and match their choice of the Company's DAQ, GPIB,
VXI,  PXI,  image  acquisition,  motion  control  or  industrial  communications
products to create  virtual  instrumentation  systems  that meet their  specific
instrumentation  needs.  The  Company's  products  empower  users to monitor and
control instruments,  create innovative  computer-based systems that can replace
instruments  at a lower  cost,  and  integrate  measurement  functionality  with
industrial  automation  to improve  efficiency  and  precision  of  applications
spanning  research,   design,  production  and  service.  Because  much  of  the
instrumentation  functionality  resides in the software, in a significant sense,
the software is the instrument.

User Benefits

      Compared with traditional solutions, the Company believes its products and
computer-based,   virtual   instrumentation   approach   provide  the  following
significant customer benefits:

      Performance, Ease-of-Use and Efficiency

      The Company's virtual instrument application software brings the power and
ease-of-use  of  computers,  networks  and the  Internet to the  instrumentation
market. With features such as graphical  programming,  automatic code generation
capabilities,  graphical  tools  libraries,  ready-to-use  example  programs and
libraries  of specific  instrumentation  functions,  users can  quickly  build a
virtual  instrument  system that meets their individual  application  needs. For
example,  a user may build the data  acquisition  and  analysis  functions of an
instrument   by  selecting  and   connecting   icons   representing   particular
instrumentation  functions  and may  customize  the  display  on the  computer's
monitor to reflect the desired presentation. With faster time to solution, users
have more time to optimize system functionality and performance,  and can devote
more  time to  their  core  work  rather  than to  programming  instruments.  In
addition,  the  continuous  improvement  in performance of PCs and the Internet,
which  are the core  platform  for the  Company's  approach,  result  in  direct
performance  benefits  for  virtual  instrument  users  in the  form  of  faster
execution for software-based measurement and automation applications,  resulting
in  shorter  test  times  and  faster  automation,   and  higher   manufacturing
throughput.

      Modularity, Reusability and Reconfigurability

      The Company's products include reusable hardware and software modules that
offer considerable flexibility in configuring systems. This ability to reuse and
reconfigure  instrument  systems  allows  users to reduce  development  time and
maximize efficiency by eliminating duplicated programming efforts and to quickly
adapt their  instruments to new and changing needs. In addition,  these features
help protect both hardware and software investments against obsolescence.

                                      -4-
<PAGE>

      Mix and Match Capabilities

      The flexibility of the Company's virtual instrumentation  approach permits
users  to mix and  match  many  combinations  of  GPIB,  VXI,  DAQ,  PXI,  image
acquisition,  motion  control and  industrial  communications  products to build
customized  instrument  solutions.   The  Company's  open  product  architecture
provides a high level of  integration  between the Company's  products and other
industry standard  instrumentation  products.  This approach provides users with
the  flexibility  to mix  and  match  the  Company's  and  third-party  hardware
components when developing custom virtual instrumentation systems.

      Long-Term Compatibility Across Multiple Computer Platforms

      The Company offers a variety of multi-platform  software products so users
can choose the platform and programming  methodology that best meets their needs
and skills.  These software products also have portable,  open  architectures so
users  can move  their  applications  among  multiple  platforms  and  operating
systems.  In addition,  the Company  strives to ensure  long-term  compatibility
between  its  products  and the latest  industry-standard  computers,  operating
systems, programming languages and tools, as well as backward compatibility with
its own product offerings.

      Network and Integrate with Customers' Computing Environments

      The  Company's  products   facilitate   connectivity  of  measurement  and
automation  systems  with the  enterprise  by utilizing  industry  communication
standards such as the Web, Ethernet and TCP/IP.  The Company's  products provide
integrated Web support,  data and file transfer between  computers,  distributed
access to  databases  and remote test and  measurement  and  process  monitoring
capabilities.  In addition,  the Company's  products are also  compatible with a
wide  variety  of  familiar,  easy-to-use  software  applications  such  as word
processors,  spreadsheets,  Web browsers, and databases. In many cases, a single
computer or workstation can serve both the  instrumentation  and general purpose
computing needs of scientists and engineers.

      Large User Base

      The Company supports and encourages the sharing of ideas, derived software
libraries  and  modules  among its broad user base  through its NI.com Web site,
user groups,  newsletters,  conferences  and seminars.  This large base of users
stimulates  the expansion of the Company's  network of  approximately  600 third
party system  integrators and consultants,  who can save users time and money by
providing  value-added  expertise,  software programs and integration of systems
for use with the Company's products.

      Lower Total Solution Cost

      The  Company  believes  that  its  virtual  instrumentation  products  and
solutions offer price/performance  advantages over traditional  instrumentation.
Virtual instrumentation  provides users the ability to utilize industry standard
computers  and  workstations  equipped  with  modular and  reusable  application
software,  cost-effective hardware and driver software that together perform the
instrumentation   functions  that  would   otherwise  be  performed  by  costly,
proprietary  instrumentation systems. In addition, virtual instrumentation gives
users the  flexibility  and  portability  to adapt to  changing  needs,  whereas
traditional  closed systems are both  expensive and time consuming to adapt,  if
adaptable at all.

Strategy

      The  Company's  objective  is to be a leading  supplier of  computer-based
virtual  instrumentation  products and  solutions to engineers,  scientists  and
others in both T&M and IA applications.  To achieve this objective,  the Company
is pursuing a strategy that includes the following elements:

      Expand Broad Customer Base

      Serve A Large and Diverse Market.  The Company's products and services are
designed to serve a broad customer base across many  industries that require T&M
and IA  applications.  The Company defines product  features and capabilities by
working  closely  with  technically  sophisticated  customers  in each of  these
industries and seeks to achieve high unit volumes by selling these same products
to a large base of customers with diverse measurement and automation needs.

      Support Many Computer and Instrument Options.  The Company diversifies its
customer base by accommodating  many popular computer platforms and a variety of
instrumentation  options. In addition, the Company expects to continue to create
or adapt  products for computer  systems and  instrumentation  options that gain
market acceptance.  Customers are provided a range of price/performance  options
through the Company's extensive line of products.

                                      -5-
<PAGE>

      Provide Worldwide  Marketing and  Distribution.  The Company uses multiple
coordinated  distribution  channels  in its major  world  markets.  The  Company
devotes  significant  resources to direct sales  activities in the United States
and in key international  markets. In addition to its direct sales channel,  the
Company's  other  distribution  channels  include  distributors,  OEMs, VARs and
systems integrators and consultants.  By using this broad range of channels, the
Company seeks to develop and maintain relations with its customers and prospects
and to provide the levels of support,  training  and  education  required by the
market.  To address the range of sales  opportunities,  the  Company  expects to
continue to pursue value-added sales channels through formal  relationships with
OEMs, VARs,  consultants or other third parties when such  relationships can add
significant  value to its  products or revenues.  The Company  intends to expand
each of these distribution networks to take advantage of market opportunities.

      Acquire New Technologies.  The Company has in the past acquired companies,
products,  and  technologies  to augment its product  offerings,  and intends to
continue  to seek  opportunities  to  satisfy  customer  needs and build  market
penetration through acquisitions of new products and technologies in the future.
In connection with these acquisitions, the Company has leveraged its established
sales channels in an effort to accelerate  the delivery of the acquired  product
to the market and build market share.

      Target Academic  Environments.  The Company markets and sells its products
to colleges and  universities,  increasing  the  potential  for future growth as
students gain experience  using the Company's  products before entering the work
force.

      Maintain High Levels of Customer Satisfaction

      Offer Innovative Modular and Integrated Solutions.  The Company intends to
continue to deliver  innovative,  modular software and hardware tools with open,
portable  architectures that can be easily integrated to create  instrumentation
systems and solutions. The Company solicits regular feedback from its customers,
resulting in the addition of new product features and enhanced  performance,  to
help  ensure  that   existing  and  new  products   meet  or  surpass   customer
expectations.

      Provide Comprehensive Customer Support and Education.  The Company's sales
and marketing  engineers  have the technical  expertise  necessary to understand
customers'  instrumentation  application  needs and work  with them to  identify
cost-effective solutions using the virtual instrumentation approach. The Company
also offers comprehensive customer support,  including technical support via the
NI.com  Web  site,   electronic  mail,   bulletin  boards,  fax  and  telephone,
newsletters,  warranty  service  and  repair,  upgrade  programs,  free and paid
seminars and technical classes.  In 1999 the Company continued to invest heavily
to leverage the Web for customer support. Through the Company's NI.com Web site,
customers  have access to a growing range of support  options to solve their own
problems directly over the Web, including software  downloads,  upgrades and bug
fixes,  automated product  configuration  tools,  knowledge  databases of common
questions and answers, live Web chat capabilities, and discussion forums.

      Deliver Long-Term Compatibility. The Company emphasizes consistency in the
implementation  of its  products  across  different  platforms  and  strives  to
maintain  a high  degree of  backward  compatibility  between  existing  and new
products, engendering a high degree of customer loyalty.

      Leverage External and Internal Technology

      Leverage  Generally  Available  Technology.   The  Company  leverages  the
research  and  development   efforts  of  vendors  of  personal   computers  and
workstations,  operating systems, programming languages and software development
tools, and their suppliers.  These  technologies are combined with the Company's
products  to  achieve  advanced  solutions  at  a  lower  development  cost.  By
integrating Web capabilities directly in its software and hardware products, the
Company's  products  allow  users of its virtual  instrument  approach to easily
distribute  measurement  and automation  capabilities  throughout  factories and
around  the  world,  and  easily  integrate   measurement  and  automation  data
throughout their organization and across the enterprise.

     Support Open Architecture on Multiple Platforms. The Company approaches the
market with an open  architecture  so users have the  flexibility to combine the
Company's  products with those from instrument  suppliers,  computer vendors and
competitors.

      Leverage  Core  Technologies.  The Company  designs  proprietary  ASICs to
optimize  performance and reduce  production  costs.  The Company utilizes these
ASICs and its other  internally  developed  hardware and software  components in
multiple products to achieve consistency and compatibility between products.

                                      -6-
<PAGE>

      Develop and Support Industry Standards.  The Company actively participates
in  efforts  to  standardize  key  technologies  by  participating  in  industry
consortia and serving on standards  committees,  such as IEEE 488, VXI,  Compact
PCI, PXI, PICmg, the Interchangeable  Virtual Instrumentation  Foundation,  also
called IVI,  Foundation  Fieldbus,  OPC, and ASAM, a new automotive  measurement
standard.  The  Company's  ongoing  strategy  is  to  conform  its  products  to
established  and  emerging  standards  in  both  the  general  computer  and the
instrumentation industries.

Products and Technology

      The  Company  offers  an  extensive  line of  hundreds  of  computer-based
products.  Engineers,  scientists  and  other  users  involved  in  T&M  and  IA
applications can use these products with computers, networks and the Internet to
develop  customer-defined  virtual instrument solutions.  The Company's products
consist of application  software,  and hardware components together with related
driver  software.  In T&M  applications,  the Company's  products can be used to
monitor  and  control  traditional   instruments  or  to  create  computer-based
instruments  that can replace the traditional  instruments.  In IA applications,
the  Company's  products  can be used in the same ways as in T&M and can also be
used  to   integrate   measurement   functionality   with   process   automation
capabilities.  The  Company's  products  are  designed  to  work  either  in  an
integrated  solution or separately.  The Company  believes that the flexibility,
functionality and ease of use of its application  software promotes sales of the
Company's other software and hardware  products.  There are many books available
on the Company's technology in English, German, French and other languages.

      Application Software

      The Company's  application  software products include both instrumentation
and  automation  software.  The Company  believes that  application  software is
playing an  increasingly  important role in the  development  of  computer-based
instruments  and  systems  in  measurement  and  automation  applications.   The
Company's  application  software products leverage the increasing  capability of
computers,  networks  and the  Internet  for  data  analysis,  connectivity  and
presentation  power to bring increasing  efficiency and precision to measurement
and automation  applications.  The Company's  instrumentation  software products
include  LabVIEW,  LabWindows/CVI,   ComponentWorks,   Measure,  Virtual  Bench,
TestStand,  DIAdem and  DASYLab.  The  Company's  automation  software  products
include  BridgeVIEW  and  Lookout.  All of the  Company's  application  software
products are highly integrated with the Company's hardware/driver software.

      Instrumentation Software

     The  Company   offers  a  variety  of  software   products  for  developing
instrumentation  applications  to meet the  different  programming  and computer
preferences of its customers.  LabVIEW,  LabWindows/CVI  and  ComponentWorks are
programming  environments with which users can develop GUIs, control instruments
and acquire,  analyze and present data. With these software products,  users can
design  custom  virtual  instruments  by creating a GUI on the  computer  screen
through  which they operate the actual  program and control  selected  hardware.
Users can  customize  front  panels  with  knobs,  buttons,  dials and graphs to
emulate  control  panels of  instruments  or add  custom  graphics  to  visually
represent  the control and operation of  processes.  LabVIEW and  LabWindows/CVI
also have  ready-to-use  libraries  for  controlling  hundreds  of  programmable
instruments,  including  serial,  GPIB and VXI, the Company's plug-in DAQ boards
and  PXI/PCI  computer-based  instruments.   ComponentWorks  has  libraries  for
controlling GPIB instruments and the Company's plug-in DAQ boards. Once created,
virtual  instruments can be modified or used as components of another program by
the original developer or another user.

      The  principal  difference  between  these  products  is in the way  users
develop  programs.   With  LabVIEW,   users  program   graphically,   developing
application  programs by connecting  icons to create "block  diagrams" which are
natural  design  notations for  scientists  and  engineers.  LabVIEW is based on
dataflow   programming   techniques   invented  and  patented  by  the  Company.
LabWindows/CVI  is designed for users who are more comfortable  programming with
the  conventional,  text-based  language of C, and  automatically  generates and
debugs    code    for    instrumentation    programs.     ComponentWorks    adds
application-specific  OLE or ActiveX  controls and  libraries  to the  Microsoft
Visual Basic, Visual C++ and Borland Delphi development environments.

                                      -7-
<PAGE>

      The  latest  revisions  of  LabVIEW,  LabWindows/CVI,  and  ComponentWorks
software  packages feature  enhanced  capabilities to allow users to more easily
integrate the Web into their  computer-based  instrumentation  applications.  In
addition,  in 1999 the Company  released  LabVIEW  Real Time and a new family of
real-time data acquisition boards that allow users who have exceptional response
requirements  to reliably  execute their  applications  even if the PC operating
system crashes - solving a key objection  some  potential  users have had in the
past to using  PC  technology  for  embedded  devices  or for  mission  critical
measurement and automation applications, and extending the range of applications
for computer-based measurement and automation.

      The Company  also sells a range of optional  add-on  products for LabVIEW,
LabWindows/CVI and ComponentWorks, such as advanced analysis libraries, database
tools and Internet integration.

      The Company  also offers a class of software  products,  VirtualBench  and
Measure,  which do not require any programming.  VirtualBench is a collection of
"turnkey" virtual  instruments that mimic the operation of traditional  benchtop
instruments,  through  the use of a PC and a plug-in  DAQ  board.  Measure is an
instrumentation  add-on for Microsoft  Excel that lets  engineers and scientists
collect instrumentation data directly into a spreadsheet.

      The Company's  instrumentation  software products also include DASYLab and
DIAdem.  DASYLab is a schematic environment by which users can quickly configure
simple DAQ applications  using both the Company's and third-party DAQ boards. In
1999, the Company added DIAdem to its line of instrumentation software products.
DIAdem is an easy to use, rapid  development  environment for data  acquisition,
monitoring,  visualization,  open and closed loop control, analysis,  automation
and documentation.  DIAdem features  extensive  off-line analysis  capabilities,
including analysis functions specific to automotive test.

      The Company also offers a software product called  TestStand  targeted for
T&M applications in a manufacturing environment.  TestStand is a test management
environment for organizing,  controlling,  and running automated production test
systems on the factory  floor.  It also  generates  customized  test reports and
integrates product and test data across the customers' enterprise and across the
Internet. TestStand manages tests that are written in LabVIEW, LabWindows/CVI, C
and C++, and  VisualBasic,  so test  engineers  can easily share and re-use test
code throughout their  organization and from one product to the next.  TestStand
is a key  element  of  the  Company's  strategy  to  broaden  the  reach  of its
application software products across the corporate enterprise.

      Automation Software

     The  Company's  Lookout and  BridgeVIEW  automation  software  products are
targeted  specifically  for  IA  applications.   Lookout  is  a  non-programming
solution.  Lookout is a human  machine  interface/supervisory  control  and data
acquisition  ("HMI/SCADA")  software  product that  requires no  programming  or
script  writing.  Lookout  provides a  scalable  architecture  for  applications
ranging  from  HMIs  to  large,  sophisticated  SCADA  applications.  BridgeVIEW
industrial  automation  software  offers a new  approach to  automation.  In the
automation  world,   LabVIEW  has  been  used  for  applications   ranging  from
manufacturing execution systems (MES) in a frame plant to supervisory control of
paper machines. BridgeVIEW builds on LabVIEW with tools tailored to IA systems.

      Hardware Products and Related Driver Software

      The Company's  hardware and related driver software products include GPIB,
VXI, DAQ, PXI, image acquisition, motion control, and industrial communications.
The Company  believes it can deliver  significant  cost/performance  benefits to
users  and  clearly  distinguish  its  products  from  competitive  products  by
designing  proprietary ASICs for use in its hardware products.  Software drivers
are  necessary  to link  hardware  to the  operating  system  and the  Company's
application  software.  The high  level of  integration  between  the  Company's
products  provides  users  with  the  flexibility  to  mix  and  match  hardware
components when developing custom virtual instrumentation systems.

      GPIB  Interfaces/Driver  Software.  GPIB,  also  known  as  the  IEEE  488
standard,  has existed since 1975 and defines the protocol for transferring data
between certain instruments and computers over an  industry-standard  cable. The
computer must be equipped with a GPIB interface.  Driver  software  controls the
interface and the transfer of data between the instrument and the computer. GPIB
is largely used in T&M applications.

                                      -8-
<PAGE>

      The Company began selling GPIB products in 1977 and is a leading  supplier
of GPIB  interface  boards  and driver  software  to  control  traditional  GPIB
instruments.  These  traditional  instruments  are  manufactured by a variety of
third-party  vendors and are used primarily in T&M  applications.  The Company's
diverse portfolio of hardware and software products for GPIB instrument  control
is available for a wide range of computers,  workstations and minicomputers. The
Company's GPIB product line also includes  products for portable  computers such
as a PCMCIA-GPIB  interface card, and products for controlling  GPIB instruments
using the computer's  standard  parallel USB, IEEE 1394  (Firewire) and Ethernet
ports.

      Portability  of GPIB  application  programs is  provided by the  Company's
NI-488.2 driver software,  considered a de facto industry standard,  and NI-VISA
driver software.  The Company offers  networking  capabilities  through its GPIB
products.  With these  products,  users can  communicate  with and control  GPIB
instruments from any point on an Ethernet-based TCP/IP network. The Company also
offers a variety of GPIB  support  products,  including  converters,  expanders,
extenders,  data  buffers and GPIB system  analyzers as well as cables and other
accessories.

      VXI  Modules/Driver   Software.  VXI  is  an  industry  standard  high-end
instrumentation  platform  developed in 1987 through an industry  consortium  to
take advantage of the  computation,  connectivity  and display  capabilities  of
desktop  computers  and  workstations.  With VXI, the physical  size of multiple
instrument  systems can be decreased and communication  between  instruments and
computers can be dramatically improved. Like GPIB, VXI is supported by a variety
of traditional  third-party instrument  manufacturers and is largely used in T&M
applications.

      VXI  instruments  are  modular  in  design  and  can be  inserted  into an
industry-standard  chassis.  Unlike GPIB instruments,  VXI modules do not have a
front  panel for  manual  operation  or  visual  data  presentation.  Therefore,
software  is  necessary  for users to create,  define the  functionality  of and
operate VXI  instrumentation  systems.  Today,  VXI is being used  primarily  to
supplement or replace high-end GPIB products in T&M applications.

      The Company is a leading supplier of VXI computer  controller hardware and
the accompanying  NI-VXI and NI-VISA driver software.  The Company also offers a
variety of VXI DAQ modules  with  NI-DAQ  driver  software,  as well as LabVIEW,
LabWindows/CVI and TestStand software products for VXI systems.

      DAQ  Hardware/Driver  Software.  DAQ hardware and driver software products
are  "instruments  on a board"  that  users can  combine  with  sensors,  signal
conditioning  hardware and software to acquire analog data and convert it into a
digital  format that can be accepted by a computer.  The Company  believes  that
computer-based DAQ products are typically a lower-cost solution than traditional
instrumentation.

      The Company  believes  that  applications  suitable  for  automation  with
computer-based DAQ products are widespread throughout many industries,  and that
many systems  currently  using  traditional  instrumentation  (either  manual or
computer-controlled)  could be displaced  by  computer-based  DAQ  systems.  The
Company  offers a range of  computer-based  DAQ products,  including  models for
digital, analog and timing input-output, and for transferring data directly to a
computer's random-access memory.

      In 1997,  the Company  introduced a family of  computer-based  instruments
that deliver  stand-alone  instrument quality and measurement  capabilities with
the  flexibility and scalability  inherent to PC-based  virtual  instrumentation
solutions. Computer-based instruments deliver features comparable to stand-alone
traditional instruments such as oscilloscopes,  DMMs, and function and arbitrary
waveform generators.

      The Company's DAQ products provide a range of  price/performance  options,
and include products for high speed  applications such as on-line monitoring and
control as well as products designed for long-term  recording of slowly changing
data such as  temperatures.  The  Company  offers DAQ  hardware/driver  software
products for numerous  desktop and notebook  computers.  The Company also offers
SCXI  (signal  conditioning  extensions  for  instrumentation)  hardware,  which
expands the types and quantity of sensors that can be connected to the Company's
data acquisition boards.

                                      -9-
<PAGE>

      PXI  Modular   Instrumentation.   The  Company's  PXI  modular  instrument
platform,  which was  introduced  in 1997,  is a desktop PC packaged in a small,
rugged form factor  with  expansion  slots and  instrumentation  extensions.  It
combines  mainstream PC software and PCI hardware with advanced  instrumentation
capabilities   designed  in  the  VXI  architecture.   In  essence,  PXI  is  an
instrumentation  PC -  delivering  many of the benefits of VXI in a much smaller
package  and at much  lower  prices.  The  Company  continues  to expand its PXI
product  offerings  with a variety of new modules,  which address a wide variety
T&M and IA  applications.  Also,  PXI  continues to gain  acceptance  as an open
industry standard, with endorsements from over 50 suppliers.

     Machine Vision/Image Acquisition.  In late 1996, the Company introduced its
first image  acquisition  hardware.  With the advanced  technologies in personal
computers and the Company's vision products,  it is cost-effective for end-users
to integrate  vision into their T&M and IA  applications.  The Company's  vision
software  is  designed  to work  with  many  different  environments,  including
LabVIEW,  LabWindows/CVI,  ComponentWorks  and BridgeVIEW.  Image acquisition is
commonly used in applications for quality control of manufactured products.

      Motion Control.  During 1997, the Company acquired technologies and assets
that resulted in the addition of a line of motion control hardware, software and
peripheral  products.  This  intelligent  PC-based  motion  control  hardware is
programmable from industry standard development  environments including LabVIEW,
LabWindows/CVI,  and  BridgeVIEW.  The Company's  software  tools for motion are
easily integrated with the Company's other product lines,  allowing motion to be
combined  with  image  acquisition,  test,  measurement,  data  acquisition  and
automation.  As in many areas,  motion control is moving to PC-based systems and
the motion  products allow users to leverage  standard  hardware and software in
measurement and automation applications to create robust, flexible solutions.

      Industrial  Communications  Interfaces.  In  mid-1995,  the Company  began
shipping its first interface boards for communicating with serial devices,  such
as dataloggers and PLCs targeted for IA applications,  and benchtop instruments,
such as oscilloscopes,  targeted for T&M applications.  Industrial  applications
need  the  same  high-quality,  easy-to-use  hardware  and  software  tools  for
communicating  with industrial  devices such as process  instrumentation,  PLCs,
single-loop  controllers,  and a  variety  of  I/O  and  DAQ  devices.  National
Instruments  offers  three  hardware  and  driver  software  product  lines  for
communication   with  industrial  devices  --  Controller  Area  Network  (CAN),
Foundation   Fieldbus,   and  RS-485  and  RS-232.   The  Company's   industrial
communication  products  are  designed  to work with  standard  serial  software
drivers,   and  Windows  versions  of  LabVIEW,   LabWindows/CVI,   Lookout  and
BridgeVIEW.

      Distributed  Input/Output  Hardware/Software.  The Company  introduced its
FieldPoint  product for distributed I/O applications in mid-1997.  FieldPoint is
an intelligent, distributed, and modular I/O system that gives industrial system
developers an economical  solution for distributed data acquisition,  monitoring
and control  applications.  The FieldPoint  system includes  isolated analog and
digital I/O modules,  terminal base  options,  and network  modules.  FieldPoint
software includes a server that provides  seamless  integration into BridgeVIEW,
driver libraries for support under LabVIEW,  LabWindows/CVI and Lookout,  and an
OPC server that provides wide  compatibility  of FieldPoint  hardware with other
industrial automation software packages.

      Customer Training Courses

      The Company offers fee-based  training classes and self-paced  course kits
for many of its software and hardware  products.  On-site courses are quoted per
customer requests.  The Company also offers programs to certify  programmers and
instructors for its products.

Markets and Applications

      The  Company's  products are used across many  industries  in a variety of
applications from research and development to production  testing and industrial
control.

Customers

      The Company has a broad  customer  base,  with no customer  accounting for
more than 3% of the Company's sales in 1999, 1998 or 1997.

                                      -10-
<PAGE>

Marketing

      Through its worldwide  marketing  efforts,  the Company strives to educate
engineers  and   scientists   about  the  benefits  of  the  Company's   virtual
instrumentation  philosophy,  products  and  technology,  and to  highlight  the
performance,  ease of use and cost advantages of its products.  The Company also
seeks to present its  position as a  technological  leader  among  producers  of
instrumentation  software and hardware and to help promulgate industry standards
that will benefit users of computer-controlled instrumentation.

      The Company reaches its intended  audience  through its Web site at NI.com
as  well  as  the   distribution   of  written  and  electronic   materials  and
demonstration disks,  participation in tradeshows and technical  conferences and
training  and user  seminars.  An in-house  staff  develops the NI.com Web site,
advertising,   publicity,  and  promotional  materials  that  the  Company  uses
worldwide. The primary marketing/sales tool is the Company's Web site at NI.com.
Throughout  1998 and 1999,  the  Company  invested  aggressively  to enhance the
content,  performance, and features of NI.com as well as to integrate E-commerce
as a core component of the Company's business model.  Through NI.com,  customers
can  view  the  Company's  complete  on-line  catalog,  interactively  configure
systems, obtain pricing in U.S. dollars, euros, and yen, place orders, track the
status of orders,  register products and obtain software upgrades. The Company's
believes its direct  business model provides the opportunity to leverage the Web
heavily to reach customers and improve operations.

      The  primary  printed  marketing/sales  tool  is  the  Company's  catalog,
published  annually and  distributed  worldwide.  The catalog is over 800 pages,
with detailed  tutorial  information  that educates  readers about the Company's
integrated product architecture and virtual instrumentation concept.  Short-form
versions of the catalog are  typically  also  available  in  languages  of major
international markets, including French, German, Spanish and Japanese.

      The  Company  also uses  quarterly  newsletters  to  educate  current  and
prospective  customers about its products and  technologies.  These  newsletters
include new product information, feature articles that educate readers about new
instrumentation   technology,   user   solution   case  studies  of   real-world
applications,  product news from Alliance Program members and key customers, and
event and customer education schedules. These newsletters are available in print
form and via email subscription.

      The   Company   actively   markets  its   products  in  higher   education
environments, and identifies many colleges, universities and trade and technical
schools as key  accounts.  The  Company  offers  special  academic  pricing  and
products to enable universities to utilize Company products in their classes and
laboratories.  The Company  believes its prominence in the higher education area
can contribute to its future success because  students gain experience using the
Company's products before they enter the work force.

Sales and Distribution

      The Company  distributes  its  software and  hardware  products  primarily
through  a  direct  sales  organization.   The  Company  also  uses  independent
distributors,  OEMs,  VARs,  system  integrators  and  consultants to market its
products.  The Company has sales  offices in the United States and sales offices
and distributors in key international markets. International sales accounted for
approximately  51%,  44%, and 41% of the  Company's  revenues in 1999,  1998 and
1997, respectively.  The Company expects that a significant portion of its total
revenues will continue to be derived from  international  sales.  See Note 13 of
Notes to Consolidated Financial Statements for details concerning the geographic
breakdown of the Company's net sales, operating income and identifiable assets.

      Through all of its sales channels, the Company seeks to approach potential
customers with a highly  technical  sales force.  The Company  believes that the
majority of sales are made directly to those persons within an organization  who
actually use the Company's products to integrate their own systems.  The Company
identifies and targets major end-user accounts as those having a large number of
actual or potential  end users,  and  believes  that it achieves a high level of
repeat  customer  sales.  The Company  targets major  accounts with a variety of
targeted  sales  and  marketing   campaigns  such  as  seminars,   user  groups,
newsletters and direct mail.

      Throughout 1999 the Company continued to invest  aggressively to integrate
the Web as a core  component  of its direct sales  model.  In 1999,  the Company
implemented  worldwide on-line pricing for products in dollars,  euros, and yen,
expanded its on-line store to allow  customers to order the complete  catalog of
products via the Web, implemented a variety of Web-based  configuration tools to
allow customers to more easily select and order multiple compatible products for
their systems, and began a Prime Access business-to-business initiative to allow
key  customers to conduct  business  directly with the Company  through  secure,
private pages at NI.com.

                                      -11-
<PAGE>

      Direct Sales

      The  Company  directly  markets and sells its  products  in the  Americas,
Canada and many  European  and  Asia/Pacific  countries.  The  Company has sales
offices  located  throughout  the  United  States  (including  the  District  of
Columbia) and in key international markets. Many of the Company's  international
sales offices employ application  engineering  technical support  specialists as
well as sales, marketing and administrative personnel.

      The Company's international sales are subject to inherent risks, including
fluctuations in local  economies;  difficulties in staffing and managing foreign
operations;  greater  difficulty in accounts  receivable  collection;  costs and
risks of  localizing  products  for  foreign  countries;  unexpected  changes in
regulatory requirements,  tariffs and other trade barriers,  difficulties in the
repatriation of earnings and burdens of complying with a wide variety of foreign
laws.  The Company's  sales outside of North  America are  denominated  in local
currencies, and accordingly, the Company is subject to the risks associated with
fluctuations  in currency  rates.  In particular,  increases in the value of the
dollar  against  foreign  currencies  decrease the dollar value of foreign sales
requiring the Company either to increase its price in the local currency,  which
could render the Company's product prices  noncompetitive,  or to suffer reduced
revenues  and gross  margins as  measured  in US dollars.  These  dynamics  have
adversely affected revenue growth in international  markets in recent years. See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations" and Note 12 of Notes to Consolidated Financial Statements.

      Distributors

      The Company  utilizes  distributors  primarily  to market its  products in
geographic areas not served by the Company's direct sales organization.

      OEMs

      The Company utilizes OEMs such as traditional instrument manufacturers who
offer  integrated  systems and/or services to their customer bases.  The Company
approaches  OEM accounts  with its standard  product  lines and offers  quantity
discounts based on volume  commitments and technical  support  capabilities  and
requirements.  The Company also promotes its sales and marketing capabilities to
its OEMs by providing specialized product training, documentation, packaging and
part numbers to simplify ordering, flexible shipping and warranty repair options
and joint promotion.

      VARs, System Integrators and Consultants

      The Company has relationships  with third-party  VARs, system  integrators
and consultants who offer add-on products and system integration services. These
third-party  developers  expand the Company's market and sales  opportunities by
adding  value to the  Company's  standard  products,  making them  suitable  for
vertical  market   applications  such  as  manufacturing   automation  or  image
processing   and   analysis.   The  Company   maintains  a  formal   third-party
sales/marketing/training  program, called the Alliance Program, which it uses to
work with many of the VARs, system integrators and consultants.  Applicants must
be sponsored  for  membership by a Company sales  engineer,  pass  qualification
criteria  and pay a nominal  annual  membership  fee. In late 1998,  the Company
introduced an elite level of its Alliance  Program  called  Select  Integrators.
Select  Integrators  must  qualify  for the  program  based upon their  level of
business  with the  Company.  As of December 31, 1999,  the  Company's  Alliance
Program had approximately 600 members including several Select Integrators.  The
Company  publishes  on-line  directories  on its NI.com Web site of  third-party
Alliance Program member products and services for use by its sales force and its
end users to locate  additional  products  and/or  services  compatible with the
Company's products.  The Company makes available to qualified  third-parties the
opportunity to participate in joint marketing and sales programs,  such as trade
shows, customer sales events and the Company's  newsletters.  In addition to its
relationships  with third party VAR,  system  integrators and  consultants,  the
Company has a direct presence in the German systems  integration  market through
its Datalog and GfS subsidiaries.

Customer Support

      The  Company  believes  the ability to provide  comprehensive  service and
support to its  customers is an important  factor in its  business.  The Company
permits customers to return products within 30 days from receipt for a refund of
the purchase price less a restocking  charge,  and generally provides a two-year
warranty  on GPIB  hardware  products,  a one-year  warranty  on other  hardware
products,  and a 90-day warranty on cables and software (medium only). Customers
may  also  purchase  a  one-year   extended   warranty  on  hardware   products.
Historically, warranty costs have not been material. Some of the key elements of
the Company's service and support strategy include:

                                      -12-
<PAGE>

      Customer Technical Support

      The  Company  maintains  a large  staff of  application  engineers  at its
corporate facility,  all of whom are highly qualified  technical  professionals.
Application  engineers are also assigned to the  Company's  major  international
offices. These application engineers provide customer support by telephone, fax,
electronic mail and world-wide Web forums,  and electronic  bulletin boards, and
are trained in both instrumentation and computer technology. In 1999 the Company
continued to invest  heavily to leverage the Web for customer  support.  Through
the  Company's  NI.com web site,  customers  have  access to a growing  range of
support  options to solve their own problems  directly  over the Web,  including
software  downloads,  upgrades and bug fixes,  automated  product  configuration
tools,  knowledge  databases  of common  questions  and  answers,  live Web chat
capabilities, and discussion forums.

      Upgrades

      The Company  typically  offers  programs in which  existing  customers can
upgrade to the latest Company products at a reduced cost.  Application  software
customers  have the option of purchasing a one-year  renewable  maintenance  and
support program,  which entitles them to new software releases for no additional
charge and priority access to the Company's technical support hotline.

      Customer Education

      The Company  offers a variety of  fee-based  training  classes  ranging in
scope from basic and introductory  courses for new users to advanced courses for
experienced users.

Competition

      The markets in which the Company  operates  are  characterized  by intense
competition  from  numerous  competitors,  some of which are  divisions of large
corporations  having far greater  resources  than the  Company,  and the Company
expects to face further  competition  from new market entrants in the future.  A
key competitor is Agilent  Technologies Inc.  ("Agilent").  The Company believes
Agilent is the  dominant  supplier of GPIB and  VXI-compatible  instruments  and
systems.  Agilent  is  also  a  leading  supplier  of  equipment  used  in  data
acquisition and control applications.  Agilent offers its own line of instrument
controllers,  as well as hardware and software  add-on  products for third-party
desktop  computers and  workstations  that  directly  compete with the Company's
computer-based instrumentation products. Agilent is aggressively advertising and
marketing  its products and system  integration  services.  Because of Agilent's
dominance in the instrumentation business,  changes in its marketing strategy or
product  offerings  could have a material  adverse  affect on the  Company.  The
Company also faces competition from a variety of other competitors.

      Certain  of  the  Company's   competitors  have  substantial   competitive
advantages  in terms of breadth of  technology,  sales,  marketing  and  support
capability and resources,  including the number of sales and technical personnel
and their  ability to cover a  geographic  area and/or  particular  account more
extensively  and with more complete  solutions  than the Company can offer,  and
more extensive  warranty support,  system  integration and service  capabilities
than those of the Company.  In addition,  large competitors can often enter into
strategic alliances with key customers or target accounts of the Company,  which
can  potentially  have a negative  impact on the  Company's  success  with those
accounts.

      The  Company  believes  its ability to compete  successfully  depends on a
number of factors  both  within and  outside  its  control,  including:  product
pricing, quality and performance;  success in developing new products;  adequate
manufacturing  capacity and supply of components  and  materials;  efficiency of
manufacturing  operations;  effectiveness  of sales and marketing  resources and
strategies;  success in leveraging the Web,  strategic  relationships with other
suppliers;   timing  of  new  product  introductions  by  the  Company  and  its
competitors;   protection  of  the  Company's   products  by  effective  use  of
intellectual  property laws; general market and economic conditions;  and events
related to weather and government  actions throughout the world. There can be no
assurance that the Company will be able to compete successfully in the future.

      The Company is continually designing new and improved products to maintain
its competitive  position.  Because of the rapidly changing computer  technology
for which many of the Company's products are designed, the Company believes that
its future success will depend in part on its ability to continue to improve its
products and technologies.  In the past, certain competitors have cloned some of
the  Company's  hardware  products  at much lower  prices,  and  promoted  these
hardware  products  as being  capable of running  the  Company's  software.  The
Company has  responded to this tactic in the past by releasing  new and improved
versions of its products  designed around  proprietary  ASICs that have improved
performance and functionality in an effort to surpass the competition.

                                      -13-
<PAGE>

Research and Development

      The Company  believes that its long-term  growth and success  depends,  in
part,  on  delivering  high quality  software and hardware  products on a timely
basis.  The Company  intends to focus its  research and  development  efforts on
enhancing  existing  products  and  developing  new  products  that  incorporate
appropriate  features  and  functionality  to be  competitive  with  respect  to
technology and price/performance.

      The Company's research and development staff strives to build quality into
products  at the design  stage in an effort to reduce  overall  development  and
manufacturing  costs. The Company's  research and development staff also designs
proprietary  ASICs, many of which are designed for use in several products.  The
goal of the ASIC  design  program  is to  further  differentiate  the  Company's
products from competing  products,  to improve  manufacturability  and to reduce
costs.  The  Company  seeks to reduce  the time to market  for new and  enhanced
products by sharing its internally  developed  hardware and software  components
across multiple products.

      In the  past,  the  Company  has  experienced  significant  delays  in the
introduction  of new  products.  The Company's  strategy of developing  products
based  primarily  on third  parties'  operating  environments  is  substantially
dependent on the Company's ability to gain pre-release access to, and to develop
expertise in, current and future product  developments of such companies.  There
can be no assurance  that the Company will continue to receive such  pre-release
access from any of these companies,  or, even with such access, that the Company
will be able to develop  products  on a timely  basis that are  compatible  with
future releases.

      The Company has implemented  certain programs,  including  pre-release bug
analysis measures and enhanced project-tracking efforts, in order to improve the
product  development  process and to permit more  accurate  product  development
scheduling.  Nonetheless,  there can be no assurance that the Company's research
and development  efforts will not encounter delays or other  difficulties,  that
development efforts will result in commercially successful products, or that the
Company's  products will not be rendered obsolete by changing  technology or new
product announcements by other companies.

      As of  December  31,  1999,  the  Company  employed  510 people in product
research and development.  The Company's research and development  expenses were
$45.5  million,  $34.8  million  and  $30.3  million  for  1999,  1998 and 1997,
respectively.

Intellectual Property

      The Company relies on a combination of patent, trade secret, copyright and
trademark  law,  contracts and  technical  measures to establish and protect its
proprietary  rights in its products.  The Company believes that legal protection
through means such as the patent and copyright laws will be less  influential on
the  Company's  ability to compete  than such factors as the  creativity  of its
development  staff, its ability to expand its market share,  develop new markets
and serve its customers.

      As of December 31, 1999,  the Company  held 97 United  States  patents (92
utility  patents and 5 design  patents)  and 5 patents in foreign  countries  (3
patents  registered in Europe in various  countries;  1 patent in Canada,  and 1
patent in Japan), and had 101 patent  applications  pending in the United States
and foreign  countries.  29 of such United States  patents are software  patents
related to LabVIEW,  and cover fundamental aspects of the graphical  programming
approach  used in LabVIEW.  The Company's  patents  expire from 2007 to 2018. No
assurance  can be given that the  Company's  pending  patent  applications  will
result in the  issuance of patents.  The Company  also owns  certain  registered
trademarks in the United States and abroad.

      Although the Company relies to some extent on trade secret  protection for
much of its technology,  and regularly obtains  confidentiality  agreements with
key  customers  who wish to know more about the  Company's  product  development
philosophy  and/or  future  directions,  there can be no  assurance  that  third
parties will not either  independently  develop the same or similar  technology,
obtain unauthorized access to the Company's proprietary technology or misuse the
technology to which the Company has granted access.

      The laws of certain foreign  countries treat the protection of proprietary
rights of the  Company  in its  products  differently  from  those in the United
States, and in many cases the protection afforded by such foreign laws is not as
strong as in the United States. The Company believes that its products and their
use do not infringe the  proprietary  rights of third  parties.  There can be no
assurance, however, that infringement claims will not successfully be made.

                                      -14-
<PAGE>

Manufacturing and Suppliers

      The Company manufactures its products at its facilities in Austin,  Texas.
Product manufacturing  operations at the Company can be divided into four areas:
electronic circuit card and module assembly;  cable assembly;  technical manuals
and  product  support  documentation;  and  software  duplication.  The  Company
manufactures  most  of  the  electronic  circuit  card  assemblies  and  modules
in-house,  although  subcontractors  are used  from  time to time.  The  Company
manufactures  some  of  its  electronic  cable  assemblies  in-house,  but  many
assemblies are produced by  subcontractors.  The Company primarily  subcontracts
its  software  duplication  and  packaging   functions.   Reliance  on  contract
manufacturers  entails  risks of  quality  problems,  less  control  of  product
pricing, and potential  unavailability of or delays in delivery of products, any
of which  could  have a  material  adverse  effect on the  Company's  results of
operations.  There  can be no  assurance  that the  Company,  together  with its
third-party manufacturers,  will be able to produce sufficient quantities of the
Company's products in a timely manner.

      The  marketplace  dictates that many of the Company's  products be shipped
very  quickly  after  an  order  is  received.  Since  purchased  component  and
manufacturing  lead  times  are  typically  much  longer  than the  short  order
fulfillment  time, the Company is required to keep adequate  amounts of finished
goods inventory and must use an accurate system for forecasting demand for those
products in its production planning  operations.  Fluctuations in demand for the
Company's  products  typically  result  from  month-to-month  variations  in the
quantity and mix of products and from normal, seasonal variations.  A variety of
circumstances,   including   inaccurate   forecasts  of  customer  demand,  poor
availability of purchased  components,  supplier  quality  problems,  production
equipment  problems,  carrier  strikes or damage to  products  in  manufacturing
operations,  could create a buildup of excess  finished goods on the one hand or
an  inability  to  timely  deliver  product  on  the  other.  See  "Management's
Discussion and Analysis of Financial Condition and Results of Operations."

      Engineering  refinements  to  the  Company's  new  hardware  and  software
products are fairly  common.  These changes can result in the  disruption of the
manufacturing  operation and concurrent delays in delivery dates. Finished goods
inventory at the Company's international warehouses and branches typically has a
short shelf life due to engineering  changes and product  upgrades  initiated by
the Company's product development  operation,  and, if managed incorrectly,  can
result in significant  quantities of obsolete  inventory.  This relatively short
shelf life,  and the resulting  requirement  to properly  manage the quantity of
inventory to meet customer demand while minimizing inventory  obsolescence,  has
been and continues to be a challenge to the Company and its branch offices.  See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations."

      The Company  obtains  most of its  electronic  components  from  suppliers
located  principally  in the  United  States  and Asia.  Some of the  components
purchased by the Company,  including ASICs, are sole-sourced.  Any disruption of
the Company's  supply of sole or limited source  components,  whether  resulting
from  quality,  production  or delivery  problems,  could  adversely  affect the
Company's  ability to  manufacture  its products,  which could in turn adversely
affect the Company's business and results of operations.

Backlog

      The Company  typically ships products shortly  following the receipt of an
order.  Accordingly,  the Company  does not view backlog data as an indicator of
future sales.

Employees

      As of December 31, 1999, the Company had 1955 employees,  including 501 in
research and development,  948 in sales and marketing and customer support,  249
in manufacturing  and 257 in administration  and finance.  None of the Company's
employees is represented by a labor union and the Company has never  experienced
a work stoppage. The Company considers its employee relations to be good.

ITEM 2.   PROPERTIES

      The Company's principal administrative,  sales, marketing,  manufacturing,
research  and  development  activities  are  conducted  at  three  Company-owned
buildings in Austin,  Texas. The Company owns  approximately 69 acres of land in
north Austin,  Texas. In 1998, the Company  completed  construction of a 232,000
square foot office facility, which is located next to an existing 140,000 square
foot  manufacturing  facility on the 69 acre  campus.  The Company is  currently
constructing  an  extension  of its  parking  facility at an  estimated  cost of
approximately $2.0 million.  The Company is also working on a plan and design of
a fourth  building,  a 380,000  square  foot  office  facility  with  associated
parking.  Pending  approval by the Company's  Board of  Directors,  construction
would  begin the fourth  quarter of 2000 with  estimated  completion  during the
first  quarter of 2002.  The  Company  also owns a 136,000  square  foot  office
building in Austin, Texas in which it houses certain of its sales operations.  A
portion of the  136,000  square  foot office  building  is  currently  leased to
International Business Machines Corporation.

                                      -15-
<PAGE>

      As of December 31, 1999, the Company also maintained a number of sales and
support offices in the United States and overseas. The Company believes existing
field  sales  and  support   facilities   are   adequate  to  meet  its  current
requirements.

ITEM 3.   LEGAL PROCEEDINGS

      Not Applicable.

ITEM 4.   SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

      No matter was  submitted to a vote of security  holders  during the fourth
quarter of the fiscal year covered by this report.

                                      -16-
<PAGE>

                                     PART II

ITEM 5.   MARKET FOR THE REGISTRANT'S  COMMON  EQUITY  AND  RELATED  STOCKHOLDER
          MATTERS

      The Company's Common Stock,  $0.01 par value,  began trading on the Nasdaq
National Market System under the symbol NATI effective March 13, 1995.  Prior to
that date,  there was no public  market for the Common  Stock.  The high and low
closing  prices for the Common  Stock in the  following  table,  as  reported by
Nasdaq,  have been  retroactively  restated to reflect the  three-for-two  stock
split declared by the Company's  Board of Directors on July 22, 1999 for holders
of record as of the close of business on August 5, 1999.

                1999           High           Low

      First Quarter 1999       23.083         17.417
      Second Quarter 1999      27.50          18.167
      Third Quarter 1999       35.344         26.167
      Fourth Quarter 1999      38.25          27.25

                1998           High           Low

      First Quarter 1998       23.25          16.833
      Second Quarter 1998      24.25          17.75
      Third Quarter 1998       22.833         14.583
      Fourth Quarter 1998      23.042         12.667

      At the close of business on February  22, 2000,  there were  approximately
863 holders of record of the Common Stock and approximately  7,000  shareholders
of beneficial interest.

      The Company believes factors such as quarterly  fluctuations in results of
operations,  announcements  by the  Company  or its  competitors,  technological
innovations, new product introductions,  governmental regulations, litigation or
changes in  earnings  estimates  by analysts  may cause the market  price of the
Common Stock to fluctuate, perhaps substantially.  In addition, stock prices for
many technology  companies fluctuate widely for reasons that may be unrelated to
their  operating  results.  These broad  market and  industry  fluctuations  may
adversely affect the market price of the Company's Common Stock.

      To date,  the Company has not paid any cash dividends on its Common Stock.
The Company  currently  anticipates  that it will retain any available  funds to
finance the growth and operation of its business and does not anticipate  paying
any cash dividends in the immediate future.

                                      -17-
<PAGE>

ITEM 6.   SELECTED CONSOLIDATED FINANCIAL DATA

      The  following  selected  consolidated  financial  data  should be read in
conjunction with the consolidated  financial statements,  including the Notes to
Consolidated  Financial  Statements.  The  information  set  forth  below is not
necessarily  indicative of results of future operations.  The information should
be read in conjunction with  "Management's  Discussion and Analysis of Financial
Condition and Results of Operations."

                                            Years Ended December 31,
                                ------------------------------------------------
                                  1999      1998      1997      1996      1995
                                --------  --------  --------  --------  --------
                                     (in thousands, except per share data)
Statements of Income Data:
Net sales:
  North America..............  $175,873  $153,435  $141,784  $114,382  $ 93,001
  Europe.....................   108,801    86,961    66,318    58,108    51,145
  Asia Pacific...............    44,909    33,834    32,777    28,225    20,673
                                --------  --------  --------  --------  --------
  Consolidated net sales.....   329,583   274,230   240,879   200,715   164,819

Cost of sales................    76,040    65,187    55,096    49,755    39,525
                                --------  --------  --------  --------  --------
  Gross profit...............   253,543   209,043   185,783   150,960   125,294
                                --------  --------  --------  --------  --------

Operating expenses:
  Sales and marketing........   120,886   100,783    87,096    72,067    63,733
  Research and development...    45,531    34,757    30,296    24,387    19,991
  General and administrative.    24,258    20,455    18,508    17,129    15,071
                                --------  --------  --------  --------  --------
  Total operating expenses...   190,675   155,995   135,900   113,583    98,795
                                --------  --------  --------  --------  --------

  Operating income...........    62,868    53,048    49,883    37,377    26,499

Other income (expense):
  Interest income............     4,759     3,439     3,455     2,405     1,635
  Interest expense...........      (404)     (463)     (502)     (844)     (875)
  Net foreign exchange (loss)
  gain.......................       130      (224)   (2,649)     (899)      150
                                --------  --------  --------  --------  --------
Income before income taxes
  and cumulative effect of
  accounting change..........    67,353    55,800    50,187    38,039    27,409

Provision for income taxes...    21,553    18,414    16,562    12,553     9,986
                                --------  --------  --------  --------  --------
Income before cumulative
  effect of accounting change    45,800    37,386    33,625    25,486    17,423
Cumulative effect of
  accounting change,
  net of tax.................      (552)       --        --        --        --
                                --------  --------  --------  --------  --------

     Net income..............  $ 45,248  $ 37,386  $ 33,625  $ 25,486  $ 17,423
                                ========  ========  ========  ========  ========

Basic earnings per share:
  Income before cumulative
  effect of accounting
  change.....................  $   0.92  $   0.76  $   0.69  $   0.53  $   0.37
  Cumulative effect of
  accounting change, net of
  tax........................     (0.01)       --        --        --        --
                                --------  --------  --------  --------  --------
  Basic earnings per share...  $   0.91  $   0.76  $   0.69  $   0.53  $   0.37
                                ========  ========  ========  ========  ========

                                      -18-
<PAGE>

Diluted earnings per share:
  Income before cumulative
  effect of accounting
  change.....................  $   0.88  $   0.73  $   0.67  $   0.52  $   0.37
  Cumulative effect of
  accounting change, net of
  tax........................     (0.01)       --        --        --        --
                                --------  --------  --------  --------  --------
  Diluted earnings per share   $   0.87  $   0.73  $   0.67  $   0.52  $   0.37
                                ========  ========  ========  ========  ========

Weighted average shares
outstanding:
  Basic......................    49,776    49,248    48,845    48,539    46,737
  Diluted....................    52,203    51,150    50,484    49,415    47,136

                                                   December 31,
                                ------------------------------------------------
                                  1999      1998      1997      1996      1995
                                --------  --------  --------  --------  --------
                                                  (in thousands)
Balance Sheet Data:

Cash and cash equivalents....  $ 45,309  $ 51,538  $ 31,943  $ 30,211  $ 12,016
Short-term investments.......    83,525    49,158    51,067    48,956    37,765
Working capital..............   173,761   133,510   112,142    99,294    74,546
Total assets.................   318,753   249,786   204,490   169,225   137,102
Long-term  debt, net of
  current portion............     4,301     4,379     5,151     9,175    11,603
Total stockholders' equity...   254,235   204,184   161,754   126,953    98,736

                                      -19-
<PAGE>

ITEM 7.   MANAGEMENT'S  DISCUSSION  AND  ANALYSIS  OF  FINANCIAL  CONDITION  AND
          RESULTS OF OPERATIONS

      The  discussion  in  this  document  contains  trend  analysis  and  other
forward-looking  statements  within the meaning of Section 27A of the Securities
Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934,
as amended.  Actual results could differ  materially from those projected in the
forward-looking  statements  throughout this document as a result of a number of
important  factors.  For a discussion of important factors that could affect the
Company's  results,  please refer to the risk factors set forth below in Factors
Affecting the Company's  Business,  in the financial line item discussions below
and elsewhere in this document.

Overview

      National  Instruments  Corporation  designs,  develops,  manufactures  and
markets  instrumentation  and  automation  software  and  hardware  for  general
commercial,  industrial and scientific applications. The Company offers hundreds
of products used to create virtual  instrumentation  systems for measurement and
automation.  The Company has  identified a large and diverse market for test and
measurement ("T&M") and industrial automation ("IA") applications. The Company's
products are used in a variety of applications  from research and development to
production testing and industrial control. In test and measurement applications,
the  Company's  products  can  be  used  to  monitor  and  control   traditional
instruments or to create computer-based instruments that can replace traditional
instruments.  In industrial automation applications,  the Company's products can
be used in the  same  ways as in test  and  measurement  and can also be used to
integrate measurement  functionality with process automation  capabilities.  The
Company sells to a large number of customers in a wide variety of industries. No
single customer  accounted for more than 3% of the Company's sales in 1999, 1998
or 1997.

      The  Company's  revenues  have grown every year since 1977 and the Company
has been profitable in every year since 1990. There can be no assurance that the
Company's  net sales  will  continue  to grow or that the  Company  will  remain
profitable  in future  periods.  As a result,  the Company  believes  historical
results  of  operations  should  not be  relied  upon as  indications  of future
performance.

                                      -20-
<PAGE>

Results of Operations

      The following table sets forth, for the periods indicated,  the percentage
of  net  sales   represented  by  certain  items   reflected  in  the  Company's
consolidated statements of income:

                                                  Years Ended December 31,
                                            ----------------------------------
                                               1999        1998         1997
                                            ----------  ----------  ----------
Net sales:
  North America.....................            53.4%       56.0%       58.9%
  Europe............................            33.0        31.7        27.5
  Asia Pacific......................            13.6        12.3        13.6
                                            ----------  ----------  ----------
  Consolidated net sales............           100.0       100.0       100.0
Cost of sales.......................            23.1        23.8        22.9
                                            ----------  ----------  ----------
  Gross profit......................            76.9        76.2        77.1
Operating expenses:
  Sales and marketing...............            36.7        36.7        36.1
  Research and development..........            13.8        12.7        12.6
  General and administrative........             7.3         7.5         7.7
                                            ----------  ----------  ----------
    Total operating expenses........            57.8        56.9        56.4
                                            ----------  ----------  ----------
    Operating income................            19.1        19.3        20.7
Other income (expense):
  Interest income ..................             1.4         1.3         1.4
  Interest expense..................            (0.1)       (0.2)       (0.2)
  Net foreign exchange gain (loss)..            --          (0.1)       (1.1)
                                            ----------  ----------  ----------
Income before income taxes and
  cumulative effect of accounting
  change............................            20.4        20.3        20.8
Provision for income taxes..........             6.5         6.7         6.9
                                            ----------  ----------  ----------
Income before cumulative effect of
  accounting change.................            13.9        13.6        13.9
Cumulative   effect  of   accounting
  change, net of tax................            (0.2)       --          --
                                            ----------  ----------  ----------
Net income..........................            13.7%       13.6%       13.9%
                                            ==========  ==========  ==========


                                      -21-
<PAGE>

      Net Sales.  In 1999, net sales for the Company's  products  reached $329.6
million,  a 20%  increase  from the level  achieved in 1998,  which  followed an
increase in net sales of 14% in 1998 over the level achieved in 1997.  This year
marks the twenty-third year of double-digit annual sales growth. The increase in
sales in these periods is primarily  attributable to the introduction of new and
upgraded  products in each period,  increased market acceptance of the Company's
products in each of the major  geographical areas in which the Company operates,
and an expanded  customer  base.  The  increase in the 1999 U.S.  dollar  annual
growth rate to 20% from 14% in 1998,  is attributed to an increase in unit sales
growth in North  America and Asia  Pacific,  a broad  increase in demand for the
Company's  products and  significant  growth in newer product areas such as PXI,
Machine Vision, Motion Control, Fieldpoint and PC based instruments.

      North American revenue was $175.9 million in 1999, an increase of 15% from
1998,  following an 8% increase in 1998 over 1997.  The increase in sales and in
the revenue  growth rate in North America in 1999 is primarily  attributable  to
the  general  recovery  in the  overall  test and  measurement  market  from the
downturn in 1998 partially attributable to the effect on the U.S. economy of the
Asian economic situation.  In addition, the Company was successful in increasing
its U.S. field sales force during 1999.

      European revenue was $108.8 million in 1999, an increase of 25% over 1998,
following a 31% increase in 1998 from 1997.  The  increase in revenue  growth in
Europe is primarily attributable to continued market acceptance of the Company's
products, the strong local economies and the Company's expansion in its European
sales force.

      Asia Pacific  revenue grew 33% to $44.9 million in 1999,  which followed a
3% increase in 1998 over 1997 levels.  The increase in the Asia Pacific  revenue
growth rate during 1999 is  primarily  attributed  to the  strengthening  of the
Japanese yen,  Korean won and other Asian  currencies and the improvement in the
state  of  these  economies  from  1998.  See  the  discussion  below  for  more
information  concerning  the impact of foreign  currency  fluctuations  on sales
growth.

      International   sales  (sales  to  customers  outside  of  North  America)
accounted for 47%, 44% and 41% of the Company's consolidated net sales for 1999,
1998 and 1997,  respectively.  The  Company  intends to  continue  to expand its
international  operations by increasing market presence in existing markets, and
continuing  to use  distributors  to sell its products in countries in which the
sales volume does not justify direct sales activities.

      The Company's international sales are subject to inherent risks, including
fluctuations in local  economies;  difficulties in staffing and managing foreign
operations;  greater  difficulty in accounts  receivable  collection;  costs and
risks of  localizing  products  for  foreign  countries;  unexpected  changes in
regulatory requirements,  tariffs and other trade barriers;  difficulties in the
repatriation of earnings and burdens of complying with a wide variety of foreign
laws.  The Company's  sales outside of North  America are  denominated  in local
currencies, and accordingly, the Company is subject to the risks associated with
fluctuations  in currency  rates.  In particular,  increases in the value of the
dollar  against  foreign  currencies  decrease the U.S.  dollar value of foreign
sales  requiring the Company either to increase its price in the local currency,
which could render the Company's  product  prices  noncompetitive,  or to suffer
reduced revenues and gross margins as measured in U.S.  dollars.  These dynamics
have  adversely  affected  revenue growth in  international  markets in 1998 and
1997.  The Company's  foreign  currency  hedging  program  includes both foreign
currency forward and purchased option contracts to reduce the effect of exchange
rate  fluctuations.  However,  the hedging program will not eliminate all of the
Company's foreign exchange risks.  (See "Foreign  Exchange  Gain/Loss" below and
Note 12 of Notes to Consolidated Financial Statements.)

      Sales  made by the  Company's  direct  sales  offices  in Europe  and Asia
Pacific are denominated in local  currencies,  and accordingly,  the U.S. dollar
equivalent  of these sales is affected by changes in the weighted  average value
of the U.S. dollar. This weighted average is calculated as the percentage change
in  the  value  of  the  currency  relative  to the  dollar,  multiplied  by the
proportion of international sales recorded in the particular  currency.  Between
1998 and 1999 this weighted  average value of the U.S.  dollar  decreased by 3%,
causing an equivalent increase in the U.S. dollar value of the Company's foreign
currency sales and expenses.  If the weighted average value during 1999 had been
the same as that in 1998,  the Company's  consolidated  net sales for 1999 would
have  been  $325.3  million  representing  a  decrease  of $4.3  million,  which
represents 19% consolidated  sales growth.  If the weighted average value during
1999 had been the same as that in 1998,  the  Company's  consolidated  operating
expenses  would  have been  $187.0  million,  representing  a  decrease  of $3.7
million.  The  preceding  proforma  amounts and  percentages  are  presented for
comparison purposes.

                                      -22-
<PAGE>

      Gross Profit. As a percentage of sales,  gross profit represented 77%, 76%
and 77% in 1999,  1998, and 1997,  respectively.  The  relatively  high software
content of the Company's  products is demonstrated in the gross margins achieved
by the Company.  The higher margin in 1999 is the result of improved  production
efficiencies and favorable foreign currency exchange rate fluctuations. In 1998,
the effect of foreign  currency  exchange  rate  fluctuations  and the weak Asia
Pacific economies  negatively impacted revenue growth and gross margin. A lesser
factor  affecting  gross  margin  includes  increased   manufacturing   expenses
attributable to the addition of a third production line in April 1998. There can
be no assurance that the Company will maintain its historical margin.

      The  marketplace  for the  Company's  products  dictates  that many of the
Company's  products be shipped  very quickly  after an order is  received.  As a
result, the Company is required to maintain significant inventories.  Therefore,
inventory  obsolescence  is a risk for the Company  due to frequent  engineering
changes,  shifting customer demand,  the emergence of new industry standards and
rapid  technological  advances  including the introduction by the Company or its
competitors of products  embodying new technology.  While the Company  maintains
valuation  allowances for excess and obsolete inventory and management continues
to monitor the adequacy of such valuation allowances,  there can be no assurance
that such valuation allowances will be sufficient.

      The Company believes that with the addition of its fourth  production line
put in place in the first  quarter of 2000 its  manufacturing  capacity  will be
more than adequate to meet anticipated needs for 2000.

      Sales and  Marketing.  Sales and marketing  expense in 1999  increased 20%
from 1998,  which followed an increase of 16% in 1998 from 1997. The increase in
the expense in absolute  amounts during 1999 and 1998 is primarily  attributable
to  programs  to  increase  the  Company's  international  presence  in both the
European and Asia Pacific  markets,  increases in sales and marketing  personnel
both internationally and in North America,  increased marketing for new products
and in its Web activities. Sales and marketing personnel increased by 145 during
1999 from 803 at  December  31,  1998 to 948 at  December  31,  1999.  Sales and
marketing expense,  as a percentage of revenue was 37% in 1999 and 1998, up from
36% in 1997.

      The Company  expects  sales and  marketing  expenses in future  periods to
increase in absolute dollars, and to fluctuate as a percentage of sales based on
initial  marketing and  advertising  campaign  costs  associated  with major new
product  releases and entry into new market  areas,  investment in the Web sales
and marketing efforts,  increasing product demonstration costs and the timing of
domestic and international conferences and trade shows.

      Research  and  Development.  Research  and  development  expense  in  1999
increased  31% compared to 1998  following an increase of 15% in 1998 over 1997.
Excluding the effect of acquisition of products, technology and assets, research
and  development  expense  grew 28%,  12% and 26%  during  1999,  1998 and 1997,
respectively.  (See Note 8 of Notes to Consolidated  Financial  Statements for a
description  of the  Company's  acquisitions.)  The  increase  in  research  and
development  expenditures (excluding the acquisition related charges in 1998 and
1997) in  absolute  amounts  and as a  percentage  of sales in each  period  was
primarily  due  to the  hiring  of  additional  product  development  engineers.
Research and  development  personnel  increased from 424 at December 31, 1998 to
501 at December 31, 1999. The Company believes that a significant  investment in
research and development is required to remain  competitive and continue revenue
growth.

      The Company  capitalizes  software  development  costs in accordance  with
Statement of Financial Accounting Standards No. 86, "Accounting for the Costs of
Computer  Software  to be Sold,  Leased,  or  Otherwise  Marketed."  The Company
amortizes  such  costs  over the  related  product's  estimated  economic  life,
generally three years,  beginning when a product  becomes  available for general
release.  Software  amortization expense totaled $2.3 million,  $2.8 million and
$1.5  million  during  1999,  1998  and  1997,  respectively.  The  decrease  in
amortization  expense is due  primarily to  amortization  in 1998 of $750,000 of
purchased  software  capitalized  in  the  1998  Datalog  acquisition.  Software
development costs capitalized during such years were $2.8 million,  $3.3 million
and $2.1  million,  respectively.  The  levels of  capitalization  for 1999 were
primarily a result of NI-DAQ 6.6, Lookout 4.0 and purchased software development
costs related to the GfS acquisition.  The significant items capitalized in 1998
include LabVIEW 5.0 and 5.1, NI-DAQ 6.5 and purchased software development costs
related  to the  Datalog  acquisition.  (See  Note 5 of  Notes  to  Consolidated
Financial Statements for a description of intangibles.)

                                      -23-
<PAGE>

      General and  Administrative.  General and administrative  expenses in 1999
increased 19% from 1998,  which followed an increase of 10.5% in 1998 from 1997.
The  majority of the increase was  comprised  of cost  attributable  to staffing
increases in the information system,  legal and human resources  departments and
the significant  increase in recruiting  costs due to the increase in the target
number  of  engineering  recruits.  Support  of the new  management  information
systems and Web based  applications  were the main focus  areas for  incremental
investment  in the  information  system  department  in 1999.  The 1999 increase
followed a 10.5%  increase in 1998,  which was primarily  driven by training and
implementation  costs of the new  management  information  systems.  General and
administrative expenses as a percentage of revenue declined to 7.3% during 1999.
The Company  expects  that  general and  administrative  costs will  continue to
increase in absolute  amounts and to fluctuate as a percentage of revenue as the
Company  continues to invest in maintaining its existing  systems and developing
Web based commerce and management information systems.

      Interest Income and Expense.  Interest  income  increased 38% in 1999 from
1998 and was flat in 1998 from 1997.  The primary  source of interest  income is
from the  investment  of proceeds  from the  Company's  issuance of common stock
under an initial  public  offering  in March 1995 and cash flow  generated  from
operations.  Net cash  provided by operating  activities  in 1999 totaled  $49.4
million.  During 1999,  interest income  increased due to the investment of cash
generated from operations. During the first half of 1998, $16.5 million was used
to pay construction costs of the Company's new office building. Interest expense
decreased  13% from 1998,  which  followed  a decrease  of 8% in 1998 from 1997.
Interest expense represents less than 1% of net sales and fluctuates as a result
of bank  borrowings  and interest  terms  thereon.  The 13% decrease in interest
expense  in  1999  from  1998  is  attributed  to  scheduled  repayments  on the
manufacturing  facility  loan.  (See Note 6 of Notes to  Consolidated  Financial
Statements for a description of the Company's debt.)

      Net  Foreign  Exchange  Gain/Loss.  The  Company  experienced  net foreign
exchange  gains of  $130,000 in 1999,  compared  to losses of $224,000  and $2.6
million  in 1998 and 1997,  respectively.  These  results  are  attributable  to
movements between the U.S. dollar and the local currencies in countries in which
the Company's sales  subsidiaries are located.  The Company recognizes the local
currency as the functional currency of its international subsidiaries.

      The Company utilizes  foreign  currency forward  contracts to economically
hedge a majority of its  foreign  currency-denominated  receivables  in order to
reduce its exposure to significant  foreign currency  fluctuations.  The Company
typically limits the duration of its foreign  exchange  forward  contracts to 90
days.

      The  Company  utilizes  foreign  currency  forward  contracts  and foreign
currency  purchased  option  contracts  in  order to  reduce  its  exposures  to
fluctuations  in future net foreign  currency cash flows.  The Company's  policy
allows for the purchase of these  contracts for up to 90% of its risk and limits
the duration of these contracts to 24 months.  It also requires that the foreign
currency  purchased  option contracts be purchased 5%  "out-of-the-money".  As a
result,  the Company's  hedging  activities only partially  address its risks in
foreign currency transactions,  and there can be no assurance that this strategy
will be  successful.  The Company does not invest in contracts  for  speculative
purposes.  (See  Note 12 of Notes to  Consolidated  Financial  Statements  for a
description of the Company's  forward and purchased  option contracts and hedged
positions.) The Company's hedging strategy has reduced the foreign exchange loss
for December 31, 1999 by $3.3 million and reduced the net foreign  exchange gain
for December 31, 1998 by $1.9 million.

      Effective  January  1, 1999,  the  Company  elected to adopt SFAS No. 133,
"Accounting for Derivative  Instruments and Hedging Activities." (See Note 11 of
Notes to Consolidated Financial Statements.)

      Provision  for Income Taxes.  The  provision  for income taxes reflects an
effective tax rate of 32% in 1999 and 33% in 1998 and 1997.

      At December 31, 1999,  seven of the Company's  subsidiaries had available,
for  income  tax  purposes,   foreign  net  operating  loss   carryforwards   of
approximately $4.2 million,  of which $3.1 million expire between 2002 and 2008.
The  remaining  $1.1  million  of  loss  carryforwards  may be  carried  forward
indefinitely  to offset future taxable income in the related tax  jurisdictions.
(See Note 7 of Notes to Consolidated Financial Statements for further discussion
of the Company's income tax provision.)

Liquidity and Capital Resources

      The Company is currently financing its operations and capital expenditures
through cash flow from operations. At December 31, 1999, the Company had working
capital of  approximately  $173.8 million compared to $133.5 million at December
31, 1998.

                                      -24-
<PAGE>

      Accounts  receivable  increased to $58.3 million at December 31, 1999 from
$45.6  million  at  December  31,  1998,  as a result  of higher  sales  levels.
Receivable  days  outstanding  at December 31, 1999 increased to 58 days from 57
days at December 31, 1998.  Consolidated  inventory  balances have  increased to
$26.2  million at December  31, 1999 from $16.5  million at December  31,  1998.
Inventory  turns of 3.6 per year for 1999 represent a decrease from turns of 4.1
per year for 1998 and  reflect the  planned  increase in the level of  inventory
related to allocated components, increased procurement of end-of-life components
and  increased   amounts  to  support  the  addition  of  the  Company's  fourth
manufacturing  line  expected to be  operational  early in the first  quarter of
2000.  The Company also expects  additional  increases in inventory in the first
half of 2000 as a result of the planned  Year 2000  contingency  increase in the
level of critical and sole-sourced components.

      Cash used for  investing  activities in 1999 includes $9.5 million for the
purchase of property and equipment, capitalization of software development costs
of $1.7  million and payment of $13.1  million,  net of cash  received,  for the
purchase of GfS.

      The  Company   currently   expects  to  fund   expenditures   for  capital
requirements  as well as liquidity  needs created by changes in working  capital
from a  combination  of  available  cash  and  short-term  investment  balances,
internally  generated  funds,  and  financing   arrangements  with  its  current
financial  institutions.  The Company has a $28.5 million credit  agreement with
Bank of America N.A.  which  consists of (i) a $20.0 million  revolving  line of
credit, and (ii) an $8.5 million manufacturing facility loan. As of December 31,
1999,  the  Company had no  outstanding  balance on the line of credit and had a
balance of $4.5 million on the  manufacturing  facility loan. The revolving line
of credit expires on December 29, 2000. The Company's credit agreements  contain
certain  financial  covenants and restrictions as to various matters,  including
the bank's prior approval of significant  mergers and  acquisitions.  Borrowings
under  the  line  of  credit  are  collateralized  by  substantially  all of the
Company's assets. (See Note 6 of Notes to Consolidated  Financial Statements for
additional information regarding the Company's debt.)

      The Company believes that the cash flow from operations,  if any, existing
cash  balances  and  short-term  investments  and  credit  available  under  the
Company's  existing  credit  facilities,  will be  sufficient  to meet  its cash
requirements for at least the next twelve months.  Cash requirements for periods
beyond the next twelve months depend on the Company's profitability, its ability
to manage working capital requirements and its rate of growth.

Market Risk

      The Company is exposed to a variety of risks,  including  foreign currency
fluctuations and changes in the market value of its  investments.  In the normal
course of business,  the Company employs established  policies and procedures to
manage its exposure to  fluctuations  in foreign  currency values and changes in
the market value of its investments.

      Foreign Currency Hedging  Activities.  The Company's objective in managing
its exposure to foreign  currency  exchange rate  fluctuations  is to reduce the
impact of adverse  fluctuations in such exchange rates on the Company's earnings
and cash flow.  Accordingly,  the Company  utilizes  purchased  foreign currency
option  contracts  and forward  contracts to hedge its  exposure on  anticipated
transactions and firm commitments. The principal currencies hedged are the euro,
British  pound and  Japanese  yen.  The Company  monitors  its foreign  exchange
exposures regularly to ensure the overall  effectiveness of its foreign currency
hedge  positions.  However,  there can be no  assurance  the  Company's  foreign
currency hedging activities will substantially offset the impact of fluctuations
in currency exchange rates on its results of operations and financial  position.
Based on the foreign exchange  instruments  outstanding at December 31, 1999, an
adverse change (defined as 20% in the Asian  currencies,  primarily the yen, and
10% in all other  currencies)  in exchange  rates  would  result in a decline in
income before taxes of approximately $27.1 million. Additionally, as the Company
utilizes  foreign  currency  instruments  for  hedging  anticipated  and  firmly
committed transactions,  management believes that a loss in fair value for those
instruments  will be  substantially  offset  by  increases  in the  value of the
underlying exposure.  (See Note 11 of Notes to Consolidated Financial Statements
for a description  of the Company's  financial  instruments at December 31, 1999
and 1998.)

                                      -25-
<PAGE>

      Short-term  Investments.  The fair value of the Company's  investments  in
marketable  securities  at December 31, 1999 was $83.5  million.  The  Company's
investment  policy is to manage its investment  portfolio to preserve  principal
and liquidity while  maximizing the return on the investment  portfolio  through
the full investment of available funds.  The Company  diversifies the marketable
securities   portfolio  by  investing  in  multiple  types  of  investment-grade
securities.   The  Company's  investment  portfolio  is  primarily  invested  in
short-term  securities  with at least an  investment  grade  rating to  minimize
interest  rate and credit risk as well as to provide for an immediate  source of
funds.  Based  on the  Company's  investment  portfolio  and  interest  rates at
December  31,  1999,  a 100 basis point  increase or decrease in interest  rates
would result in a decrease or increase of less than $420,000,  respectively,  in
the fair value of the investment  portfolio.  Although changes in interest rates
may affect the fair value of the investment portfolio and cause unrealized gains
or losses, such gains or losses would not be realized unless the investments are
sold.

Factors Affecting the Company's Business

      Fluctuations  in Quarterly  Results.  The  Company's  quarterly  operating
results  have  fluctuated  in the past and may  fluctuate  significantly  in the
future due to a number of  factors,  including:  changes in the mix of  products
sold; the availability and pricing of components from third parties  (especially
sole sources);  the timing of orders;  level of pricing of international  sales;
fluctuations in foreign  currency  exchange rates; the difficulty in maintaining
margins,  including the higher margins  traditionally  achieved in international
sales;  and  changes in pricing  policies by the  Company,  its  competitors  or
suppliers.  Specifically,  if the local  currencies  in which the Company  sells
weaken against the U.S. dollar,  and if the local sales prices cannot be raised,
the Company will experience a deterioration of its gross and net profit margins.
The Company expects the increased costs of the fourth  manufacturing line and an
adverse  change  in the  European  foreign  currency  exchange  rates  to have a
negative effect on gross and net profit margins in the first and second quarters
of 2000.

      As has occurred in the past and as may be expected to occur in the future,
new software  products of the Company or new operating  systems of third parties
on which the Company's products are based, often contain bugs or errors that can
result in reduced  sales and/or cause the  Company's  support costs to increase,
either of which could have a material adverse impact on the Company's  operating
results.  Furthermore,  the Company has  significant  revenues from customers in
industries such as semiconductors, automated test equipment, telecommunications,
aerospace,  defense and  automotive  which are cyclical in nature.  Downturns in
these  industries  like those  experienced  in 1998 could  again have a material
adverse effect on the Company's operating results.

      In  recent  years,  the  Company's  revenues  have been  characterized  by
seasonality,  with revenues  typically being  relatively  constant in the first,
second and third  quarters,  growing in the fourth quarter and being  relatively
flat or declining  from the fourth  quarter of the year to the first  quarter of
the following year. If this historical pattern continues, revenues for the first
quarter of 2000 may not exceed  revenues from the fourth quarter of 1999.  Also,
the  Company's  results  of  operations  in the  third  quarter  of 2000  may be
adversely affected by lower sales levels in Europe, which typically occur during
the summer months.  The Company  believes the seasonality of its revenue results
from the  international  mix of its revenue and the variability of the budgeting
and purchasing cycles of its customers throughout each international  region. In
addition,  total operating  expenses have in the past tended to be higher in the
second and third quarters of each year, due to college  recruiting and increased
intern personnel expenses.

      New  Product  Introductions  and  Market  Acceptance.  The  market for the
Company's  products is characterized  by rapid  technological  change,  evolving
industry  standards,   changes  in  customer  needs  and  frequent  new  product
introductions, and is therefore highly dependent upon timely product innovation.
The  Company's  success is  dependent  in part on its  ability  to  successfully
develop and  introduce  new and  enhanced  products on a timely basis to replace
declining  revenues  from  older  products,  and on  increasing  penetration  in
international  markets.  In the past,  the Company has  experienced  significant
delays between the announcement and the commercial availability of new products.
Any  significant  delay in releasing new products could have a material  adverse
effect on the ultimate success of a product and other related products and could
impede  continued  sales of  predecessor  products,  any of which  could  have a
material  adverse  effect on the Company's  operating  results.  There can be no
assurance  that the Company will be able to introduce new products in accordance
with announced  release dates,  that new products will achieve market acceptance
or that  any such  acceptance  will be  sustained  for any  significant  period.
Failure of new  products to achieve or sustain  market  acceptance  could have a
material adverse effect on the Company's operating results.  Moreover, there can
be no assurance that the Company's international sales will continue at existing
levels or grow in  accordance  with the  Company's  efforts to increase  foreign
market penetration.

                                      -26-
<PAGE>

      Risks associated with Increased  Development of Web site. During 1999, the
Company  devoted  significant  resources  in  developing  its Web  site as a key
marketing  and sales tool and expects to continue to do so in the future.  There
can be no  assurance  that  the  Company  will be able to be  successful  in its
attempt to leverage  the Web to increase  sales.  The Company  hosts its own Web
site internally. Failure to successfully maintain the Web site and to protect it
from external hackers could have a significant impact on the Company's results.

      Operation  in  Intensely  Competitive  Markets.  The  markets in which the
Company  operates  are  characterized  by  intense   competition  from  numerous
competitors,  some of which  are  divisions  of large  corporations  having  far
greater  resources  than the  Company,  and the Company  expects to face further
competition  from new market entrants in the future. A key competitor is Agilent
Technologies  Inc.  ("Agilent").  Agilent  offers  its own  line  of  instrument
controllers,   and  also  offers  hardware  and  software  add-on  products  for
third-party  desktop  computers and  workstations  that provide  solutions  that
directly compete with the Company's virtual instrumentation products. Agilent is
aggressively  advertising and marketing  products that are competitive  with the
Company's products.  Because of Agilent's strong position in the instrumentation
business,  changes in its marketing  strategy or product  offerings could have a
material adverse effect on the Company's operating results.

      The  Company  believes  its ability to compete  successfully  depends on a
number of factors  both within and outside its control,  including:  new product
introductions by competitors;  product pricing; quality and performance; success
in  developing  new  products;  adequate  manufacturing  capacity  and supply of
components and materials; efficiency of manufacturing operations;  effectiveness
of sales and marketing  resources and strategies;  strategic  relationships with
other suppliers;  timing of new product introductions by the Company; protection
of the  Company's  products by  effective  use of  intellectual  property  laws;
general market and economic  conditions;  and government  actions throughout the
world.  There  can be no  assurance  that the  Company  will be able to  compete
successfully in the future.

      Management  Information  Systems.   During  1999,  the  Company  completed
implementation of the contact management and technical support incident tracking
system in the three remaining European branches, the U.S. and Japan. The Company
also  devoted  significant  effort  to  the  development  of  our  Web  commerce
offerings.  In 2000, the Company will implement an advanced  planning  system to
enhance  predictability  of material flow in its manufacturing  operations.  The
Company will also devote significant  resources to the continued  development of
Web  and  e-commerce   offerings.   Failure  to  successfully   implement  these
initiatives could have a material adverse effect on the results of operations.

      The Company  relies on three primary  regional  centers for its management
information systems. As with any information system, unforeseen issues may arise
that could affect management's ability to receive adequate,  accurate and timely
financial   information  which  in  turn  could  inhibit  effective  and  timely
decisions.  Furthermore,  it is possible that one or more of the Company's three
regional information systems could experience a complete or partial shutdown. If
this  shutdown  occurred near the end of a quarter it could impact the Company's
product shipments and revenues,  as product distribution is heavily dependent on
the  integrated  management  information  systems in each  region.  Accordingly,
operating  results  in that  quarter  would  be  adversely  impacted  due to the
shipments,  which would not occur  until the  following  period.  The Company is
working to achieve reliable regional  management  information systems to control
costs and improve the ability to deliver its  products in  substantially  all of
its direct  markets  worldwide.  No  assurance  can be given that the  Company's
efforts will be successful. The failure to receive adequate, accurate and timely
financial  information could inhibit  management's ability to make effective and
timely decisions.

                                      -27-
<PAGE>

      Risks  Associated  with  International  Operations and Foreign  Economies.
International  sales are subject to inherent  risks,  including  fluctuations in
local  economies,  difficulties  in staffing  and managing  foreign  operations,
greater  difficulty  in  accounts  receivable  collection,  costs  and  risks of
localizing  products for foreign  countries,  unexpected  changes in  regulatory
requirements, tariffs and other trade barriers, difficulties in the repatriation
of earnings  and the burdens of complying  with a wide variety of foreign  laws.
The  regulatory  environment in some emerging  countries is very  restrictive as
their  governments  try to protect  their local economy and value of their local
currency  against the U.S.  dollar.  Sales made by the  Company's  international
direct sales offices are denominated in local currencies,  and accordingly,  the
U.S.  dollar  equivalent  of these sales is affected by changes in the  weighted
average value of the U.S.  dollar.  This  weighted  average is calculated as the
percentage  change  in  the  value  of the  currency  relative  to  the  dollar,
multiplied by the proportion of  international  sales recorded in the particular
currency.  Between 1998 and 1997 this weighted  average value of the U.S. dollar
decreased by 3%, causing an equivalent  increase in the U.S. dollar value of the
Company's  foreign  currency sales and expenses.  If the weighted  average value
during 1999 had been the same as that in 1998,  the Company's  consolidated  net
sales for 1999 would have been $325.3  million  representing  a decrease of $4.3
million, which represents 19% consolidated sales growth. If the weighted average
value during 1999 had been the same as that in 1998, the Company's  consolidated
operating  expenses would have been $187.0  million,  representing a decrease of
$3.7 million.  If the U.S. dollar strengthens again in the future, it could have
a materially adverse effect on the operating results of the Company.

      Dependence on Key  Suppliers.  The Company's  manufacturing  processes use
large volumes of high-quality  components and subassemblies  supplied by outside
sources.  Several of these  components  are  available  through  sole or limited
sources.    Sole-source    components   purchased   by   the   Company   include
application-specific  integration  circuits ("ASICS") and other components.  The
Company has in the past  experienced  delays and quality  problems in connection
with sole-source  components,  and there can be no assurance that these problems
will not recur in the future.  Accordingly,  the failure to receive  sole-source
components from suppliers could result in a material  adverse effect on revenues
and results of operations.

      Proprietary  Rights and Intellectual  Property  Litigation.  The Company's
success depends in part on its ability to obtain and maintain  patents and other
proprietary rights relative to the technologies used in its principal  products.
Despite the Company's  efforts to protect its proprietary  rights,  unauthorized
parties  may have in the past  infringed  or violated  certain of the  Company's
intellectual property rights. The Company is currently litigating a complaint in
federal court alleging patent infringement by the products of the defendant.  As
is typical in the  industry,  the Company from time to time may be notified that
it is infringing certain patent or intellectual property rights of others. While
no actions are  currently  pending  against the Company,  other than  invalidity
claims in response to the previously  mentioned  patent  infringement  complaint
initiated by the Company,  there can be no assurance that litigation will not be
initiated  in  the  future  which  may  cause  significant  litigation  expense,
liability and a diversion of  management's  attention  which may have a material
adverse effect on results of operations.

      Dependence  on Key  Management  and  Technical  Personnel.  The  Company's
success depends to a significant degree upon the continued  contributions of its
key  management,  sales,  marketing,  research and  development  and operational
personnel  including  Dr.  Truchard,  Mr.  Kodosky  and other  members of senior
management and key technical personnel.  The Company has no agreements providing
for the  employment  of any of its key  employees  for any  fixed  term  and the
Company's key employees may  voluntarily  terminate  their  employment  with the
Company at any time.  The loss of the  services of one or more of the  Company's
key  employees in the future could have a material  adverse  effect on operating
results.  The Company also believes its future success will depend in large part
upon its ability to attract and retain  additional  highly  skilled  management,
technical,  marketing,  research and development, and operational personnel with
experience in managing large and rapidly changing companies, including companies
acquired through  acquisition,  as well as training,  motivating and supervising
the employees. In addition, the recruiting environment for software engineering,
sales and other technical  professionals  is very  competitive.  Competition for
qualified software engineers is particularly  intense and is likely to result in
increased  personnel  costs.  Failure to attract  or retain  qualified  software
engineers could have an adverse effect on the Company's  operating results.  The
Company also recruits and employs foreign  nationals to achieve its hiring goals
primarily for entry-level  engineering and software  positions.  There can be no
guarantee that the Company will continue to be able to recruit foreign nationals
to the current  degree if  government  requirements  for temporary and permanent
residence  become  increasingly  restrictive.  These factors  further  intensify
competition  for key  personnel,  and there can be no assurance that the Company
will be successful  in retaining  its existing key  personnel or attracting  and
retaining  additional key personnel.  Failure to attract and retain a sufficient
number of  technical  personnel  could  have a  material  adverse  effect on the
results of operations.

                                      -28-
<PAGE>

      Risk of Product Liability Claims.  The Company's  products are designed in
part to provide  information upon which the users may rely. The Company attempts
to assure the quality and accuracy of the  processes  contained in its products,
and to limit its product liability exposure through  contractual  limitations on
liability,  including  disclaimers in its "shrink wrap" license  agreements with
end-users.  If future products contain errors that produce  incorrect results on
which  users  rely,  customer  acceptance  of the  Company's  products  could be
adversely  affected.  Further,  the Company could be subject to liability claims
that could have a material adverse effect on the Company's  operating results or
financial position.  Although the Company maintains liability  insurance,  there
can be no assurance that such insurance or the  contractual  provisions  used by
the Company to limit its liability will be sufficient.

      The Year 2000.  During fiscal years 1999 and 1998,  the Company had a Year
2000 project in place to address the potential  exposures  related to the impact
on our  computer  systems  and  products  for the Year  2000 and  beyond.  As of
December 31, 1999, all scheduled Y2K work was completed.  As of the date hereof,
the  Company  encountered  no  material  Y2K  system  problems  and no impact on
operations  or expenses has occurred.  However,  the success to date of its Year
2000 efforts cannot  guarantee that a Year 2000 problem  affecting third parties
upon which it relies will not become apparent in the future.

ITEM 7(a).MARKET RISK

      Response to this item is included in "Item 7 - Management's  Discussion of
Analysis of Financial Condition and Results of Operations - Market Risk" above.

ITEM 8.   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

      The information  required by this item is incorporated by reference to the
Consolidated Financial Statements set forth on pages F-1 through F-20 hereof.

ITEM 9.   CHANGES IN  AND  DISAGREEMENTS  WITH  ACCOUNTANTS  ON  ACCOUNTING  AND
          FINANCIAL DISCLOSURE

      Not applicable.

                                      -29-
<PAGE>

                                     PART III

      Certain  information  required by Part III is omitted  from this Report in
that the Registrant  intends to file a definitive  proxy  statement  pursuant to
Regulation  14A  with  the  Securities  and  Exchange   Commission  (the  "Proxy
Statement")  relating to its annual meeting of  stockholders  not later than 120
days  after  the end of the  fiscal  year  covered  by  this  Report,  and  such
information is incorporated by reference herein.

ITEM 10.   DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

      The information  concerning the Company's  directors required by this Item
is  incorporated by reference to the Company's Proxy Statement under the heading
"Election of Directors."

      The information  concerning the Company's  executive  officers required by
this Item is  incorporated  by reference to the Company's  Proxy Statement under
the heading "Executive Officers."

ITEM 11.   EXECUTIVE COMPENSATION

      The information  required by this Item is incorporated by reference to the
Company's Proxy Statement under the heading "Election of Directors."

ITEM 12.   SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

      The information  required by this Item is incorporated by reference to the
Company's Proxy Statement under the heading "Election of Directors."

ITEM 13.   CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

      Not applicable.

                                      -30-
<PAGE>

                                     PART IV

ITEM 14.   EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

      (a)   Documents Filed with Report

          1.   Financial  Statements.   See  Index  to  Consolidated   Financial
               Statements  at  page  F-1 of this  Form  10-K  and the  Financial
               Statements  and Notes  thereto which are included at pages F-2 to
               F-20 of this Form 10-K.

          2.   Exhibits

               Exhibit
               Number   Description

               3.1*     Certificate of Incorporation of the Company.
               3.2*     Bylaws of the Company.
               4.1*     Specimen of Common Stock certificate of the Company.
               4.2*     Rights Agreement dated as of May 19, 1994,
                        between the Company and The First National Bank
                        of Boston.

              10.1*     Form of Indemnification Agreement.
              10.2*     1994 Incentive Plan.
              10.3*     1994 Employee Stock Purchase Plan.
              10.5**    Loan Agreements dated as of June 30, 1998,
                        between the Company and Bank of America, N.A.,
                        as amended and supplemented.
              11.1      Computation of Earnings Per Share.
              21.1      Subsidiaries of the Company.
              23.1      Consent of Independent Accountants.
              24.0      Power of Attorney (see page 33).
              27.0      Financial Data Schedule (see Part II, Item 6).

               *    Incorporated  by  reference  to the  Company's  Registration
                    Statement on Form S-1 (Reg. No. 33-88386) declared effective
                    March 13, 1995.

               **   Incorporated by reference to the Company's  Quarterly Report
                    on Form 10-Q for the quarter ended June 30, 1998.

      (b)   Reports on Form 8-K

            Not Applicable.

      (c)   Exhibits

            See Item 14(a)(2) above.

                                      -31-
<PAGE>

                                   SIGNATURES

Pursuant to the  requirements of Section 13 or 15(d) of the Securities  Exchange
Act of 1934,  the  registrant  has duly  caused  this report to be signed on its
behalf by the undersigned thereunto duly authorized.

                             Registrant

                             NATIONAL INSTRUMENTS CORPORATION

March 22, 2000               BY:  /s/ James J. Truchard
                                  Dr. James J. Truchard
                                  Chairman of the Board and President

                                POWER OF ATTORNEY

     KNOW ALL  PERSONS  BY THESE  PRESENTS,  that each  person  whose  signature
appears  below  constitutes  and appoints Dr. James J. Truchard and Alexander M.
Davern,  jointly and severally,  his  attorneys-in-fact,  each with the power of
substitution,  for him in any and all capacities, to sign any amendments to this
Report on Form  10-K,  and to file the same,  with  exhibits  thereto  and other
documents in connection therewith,  with the Securities and Exchange Commission,
hereby ratifying and conforming all that each of said attorneys-in-fact,  or his
substitute or substitutes, any do or cause to be done by virtue hereof.

     Pursuant to the  requirements of the Securities  Exchange Act of 1934, this
report  has  been  signed  below  by the  following  persons  on  behalf  of the
registrant and in the capacities and on the dates indicated.
- --------------------------------------------------------------------------------

         Signature                 Capacity in Which Signed             Date

- --------------------------------------------------------------------------------

/s/ James J. Truchard             Chairman of the Board and
Dr. James J. Truchard           President (Principal Executive    March 22, 2000
                                           Officer)
- --------------------------------------------------------------------------------

/s/ Alexander M. Davern             Chief Financial Officer
Alexander M. Davern            and Treasurer (Principal Financial March 22, 2000
                                    and Accounting Officer)
- --------------------------------------------------------------------------------

/s/ Jeffrey L. Kodosky                     Director               March 22, 2000
Jeffrey L. Kodosky
- --------------------------------------------------------------------------------

/s/ William C. Nowlin, Jr.                 Director               March 22, 2000
William C. Nowlin, Jr.
- --------------------------------------------------------------------------------

/s/ L. Wayne Ashby                         Director               March 22, 2000
L. Wayne Ashby
- --------------------------------------------------------------------------------

/s/ Donald M. Carlton                      Director               March 22, 2000
Dr. Donald M. Carlton
- --------------------------------------------------------------------------------

/s/ Ben G. Streetman                       Director               March 22, 2000
Ben G. Streetman
- --------------------------------------------------------------------------------

/s/ R. Gary Daniels                        Director               March 16, 2000
R. Gary Daniels
- --------------------------------------------------------------------------------

                                      -32-

<PAGE>

                         NATIONAL INSTRUMENTS CORPORATION
                          INDEX TO FINANCIAL STATEMENTS



Financial Statements:                                              Page No.

Report of Independent Accountants                                    F-2
Consolidated Balance Sheets as of December 31, 1999 and 1998         F-3
Consolidated Statements of Income for the Three Years Ended
December 31, 1999                                                    F-4
Consolidated Statements of Cash Flows for the Three Years Ended
December 31, 1999                                                    F-5
Consolidated Statements of Stockholders' Equity for the
Three Years Ended December 31, 1999                                  F-6
Notes to Consolidated Financial Statements                           F-7

Financial Statement Schedules:
For the Three Years Ended December 31, 1999
      Schedule II - Valuation and Qualifying Accounts

      All other  schedules  are omitted  because they are not  applicable or the
required information is shown in the financial statements or notes thereto.

                                      -F1-
<PAGE>

                        Report of Independent Accountants

To the Board of Directors and Stockholders of National Instruments Corporation

     In  our  opinion,  the  consolidated  financial  statements  listed  in the
accompanying  index  present  fairly,  in all material  respects,  the financial
position of National  Instruments  Corporation and its  subsidiaries at December
31, 1999 and 1998, and the results of their  operations and their cash flows for
each of the three years in the period ended December 31, 1999 in conformity with
accounting  principles generally accepted in the United States. In addiiton,  in
our opinion,  the financial statement schedule listed in the accompanying index,
presents  fairly,  in all material  respects,  the information set forth therein
when read in conjunction  with the related  consolidated  financial  statements.
These   financial   statements   and  financial   statement   schedule  are  the
responsibility of the Company's management;  our responsibility is to express an
opinion on these financial  statements and financial statement schedule based on
our audits.  We conducted  our audits of these  statements  in  accordance  with
auditing standards  generally accepted in the United States,  which require that
we plan and perform the audit to obtain  reasonable  assurance about whether the
financial  statements  are free of  material  misstatement.  An  audit  includes
examining,  on a test basis,  evidence supporting the amounts and disclosures in
the  financial   statements,   assessing  the  accounting  principles  used  and
significant  estimates made by management,  and evaluating the overall financial
statement  presentation.  We believe that our audits provide a reasonable  basis
for the opinion expressed above.

/s/ PricewaterhouseCoopers LLP
Austin, Texas

January 18, 2000

                                      -F2-
<PAGE>

                        National Instruments Corporation
                           Consolidated Balance Sheets
                        (In thousands, except share data)

                                     Assets

                                                            December 31,
                                                      -----------------------
                                                         1999         1998
                                                      ----------   ----------
Current assets:
 Cash and cash equivalents...................         $  45,309    $  51,538
 Short-term investments......................            83,525       49,158
 Accounts receivable, net....................            58,279       45,622
 Inventories.................................            26,161       16,454
 Prepaid expenses and other current assets...            11,216        6,687
 Deferred income tax, net....................             6,539        4,937
                                                      ----------   ----------
    Total current assets.....................           231,029      174,396

Property and equipment, net..................            69,771       66,131
Intangibles and other assets.................            17,953        9,259
                                                      ----------   ----------
    Total assets.............................         $ 318,753    $ 249,786
                                                      ==========   ==========

                      Liabilities and Stockholders' Equity

Current liabilities:
 Current portion of long-term debt...........         $     876    $     849
 Accounts payable............................            23,318       17,242
 Accrued compensation........................            11,021        7,895
 Accrued expenses and other liabilities......            10,326        5,011
 Income taxes payable........................             4,739        5,893
 Other taxes payable.........................             6,988        3,996
                                                      ----------   ----------
    Total current liabilities................            57,268       40,886

Long-term debt, net of current portion.......             4,301        4,379
Deferred income taxes, net...................             2,949          337
                                                      ----------   ----------
    Total liabilities........................            64,518       45,602
                                                      ----------   ----------

Commitments and contingencies................                --           --
Stockholders' equity:
    Common stock: par value $.01; 180,000,000
     shares authorized; 50,047,182 and
     49,414,110 shares issued and
     outstanding, respectively...............               500          495
     Additional paid-in capital..............            58,830       51,496
     Retained earnings.......................           198,849      153,601
     Accumulated other comprehensive loss....            (3,944)      (1,408)
                                                      ----------   ----------
    Total stockholders' equity...............           254,235      204,184
                                                      ----------   ----------
    Total liabilities and stockholders' equity        $ 318,753    $ 249,786
                                                      ==========   ==========

The accompanying notes are an integral part of these financial statements.

                                      -F3-
<PAGE>

                        National Instruments Corporation
                        Consolidated Statements of Income
                      (In thousands, except per share data)

                                                        For the Years
                                                      Ended December 31,
                                              ----------------------------------
                                                 1999        1998        1997
                                              ----------  ----------  ----------

Net sales................................     $ 329,583   $ 274,230   $ 240,879
Cost of sales............................        76,040      65,187      55,096
                                              ----------  ----------  ----------
   Gross profit..........................       253,543     209,043     185,783
                                              ----------  ----------  ----------

Operating expense:
   Sales and marketing...................       120,886     100,783      87,096
   Research and development..............        45,531      34,757      30,296
   General and administrative............        24,258      20,455      18,508
                                              ----------  ----------  ----------
   Total operating expenses..............       190,675     155,995     135,900
                                              ----------  ----------  ----------

   Operating income......................        62,868      53,048      49,883

Other income (expense):
   Interest income.......................         4,759       3,439       3,455
   Interest expense......................          (404)       (463)       (502)
   Net foreign exchange gain/(loss) .....           130        (224)     (2,649)
                                              ----------  ----------  ----------
Income before income taxes and cumulative
   effect of accounting change...........        67,353      55,800      50,187
Provision for income taxes...............        21,553      18,414      16,562
                                              ----------  ----------  ----------
Income before cumulative effect of
   accounting change.....................        45,800      37,386      33,625
Cumulative effect of accounting change,
   net of tax............................          (552)         --          --
                                              ----------  ----------  ----------
   Net income............................     $  45,248   $  37,386   $  33,625
                                              ==========  ==========  ==========

Basic earnings per share:
  Income before cumulative effect of          $    0.92   $    0.76   $    0.69
  accounting change......................
  Cumulative effect of accounting change,
  net of tax.............................         (0.01)         --          --
                                              ----------  ----------  ----------
  Basic earnings per share...............     $    0.91   $    0.76   $    0.69
                                              ==========  ==========  ==========

Diluted earnings per share:
  Income before cumulative effect of          $    0.88   $    0.73   $    0.67
  accounting change......................
  Cumulative effect of accounting change,
  net of tax.............................         (0.01)         --          --
                                              ----------  ----------  ----------
  Diluted earnings per share.............     $    0.87   $    0.73   $    0.67
                                              ==========  ==========  ==========

Weighted average shares outstanding:
  Basic..................................        49,776      49,248      48,845
  Diluted................................        52,203      51,150      50,484

The accompanying notes are an integral part of these financial statements.

                                      -F4-
<PAGE>

                        National Instruments Corporation
                      Consolidated Statements of Cash Flows
                                 (In thousands)

                                                        For the Years
                                                      Ended December 31,
                                              ----------------------------------
                                                 1999        1998        1997
                                              ----------  ----------  ----------
Cash flow from operating activities:
 Net income...............................    $  45,248   $  37,386   $  33,625
 Adjustments to reconcile net income to
  cash provided by operating activities:
 Charges to income not requiring cash
  outlays:
     Depreciation and amortization........       13,026      11,638       8,715
     Provision for (benefit from) deferred
      income taxes........................          204       1,529      (3,072)
     Purchase of in-process research &
      development.........................        2,130          --       1,400
 Changes in operating assets and
  liabilities:
     Increase in accounts receivable......       (9,963)     (5,678)     (4,059)
     Increase in inventory................       (9,002)       (605)     (4,335)
     Increase in prepaid expenses and
      other assets........................       (7,761)       (952)     (6,506)
     Increase in accounts payable.........        6,918       1,128       4,741
     Increase in accrued expenses and
      other liabilities...................        5,936       1,730       1,199
                                              ----------  ----------  ----------
 Net cash provided by operating activities       46,736      46,176      31,708
                                              ----------  ----------  ----------

Cash flow from investing activities:
 Payments for acquisitions, net of cash
   received...............................      (13,072)     (1,519)     (2,000)
 Capital expenditures.....................       (9,452)    (27,985)    (21,998)
 Additions to intangibles.................       (2,188)     (2,667)     (2,102)
 Purchases of short-term investments......     (268,965)    (52,188)    (48,408)
 Sales of short-term investments..........      234,808      54,097      46,298
                                              ----------  ----------  ----------
Net cash used in investing activities.....      (58,869)    (30,262)    (28,210)
                                              ----------  ----------  ----------

Cash flow from financing activities:
 Repayments of long-term debt.............       (1,435)       (824)     (4,640)
 Net proceeds from issuance of common
   stock under employee plans.............        7,339       4,505       2,874
                                              ----------  ----------  ----------
Net cash provided by (used in) financing
 activities...............................        5,904       3,681      (1,766)
                                              ----------  ----------  ----------

Net increase (decrease)in cash and cash
 equivalents..............................       (6,229)     19,595       1,732
Cash and cash equivalents at beginning of
 period...................................       51,538      31,943      30,211
                                              ----------  ----------  ----------
Cash and cash equivalents at end of period    $  45,309   $  51,538   $  31,943
                                              ==========  ==========  ==========

Cash paid for interest and income taxes
   Interest...............................    $     336   $     499   $     451
                                              ==========  ==========  ==========
   Income taxes...........................    $  21,283   $  16,008   $  21,490
                                              ==========  ==========  ==========

The accompanying notes are an integral part of these financial statements.

                                      -F5-
<PAGE>

                        National Instruments Corporation
                 Consolidated Statements of Stockholders' Equity
                        (In thousands, except share data)
<TABLE>
<CAPTION>

                                                                 Unrealized     Accumulated
                       Common     Common   Additional            Gain/(Loss)    Other          Total
                       Stock      Stock    Paid-In     Retained  on Derivative  Comprehensive  Stockholders'
                      (Shares)    Amount   Capital     Earnings  Instruments    Gain/(Loss)    Equity
                      ----------  -------  ----------  --------  -------------  -------------  -------------
<S>                   <C>         <C>      <C>         <C>       <C>            <C>            <C>
Balance at December
 31, 1996...........  48,695,041  $   488  $  44,124   $ 82,590  $        --    $      (249)   $   126,953
Net income..........                                     33,625                                     33,625
Foreign currency
 translation
 adjustment (net of
 $844 tax benefit)..                                                                 (1,713)        (1,713)
Unrealized gain on
 securities
 available for sale
 (net of $0 tax
 expense)...........                                                                     15             15
                      --------------------------------------------------------------------------------------
 Comprehensive
  income............                                     33,625           --         (1,698)        31,927
Issuance of common
 stock under
 employee plans.....     289,668        2      2,872                                                 2,874
============================================================================================================

Balance at December
 31, 1997...........  48,984,709  $   490  $  46,996   $116,215  $        --    $    (1,947)   $   161,754
Net income..........                                     37,386                                     37,386
Foreign currency
 translation
 adjustment (net of
 $288 tax expense)..                                                                    584            584
Unrealized loss on
 securities
 available for sale
 (net of $0 tax
 benefit)...........                                                                    (45)           (45)
                      --------------------------------------------------------------------------------------
 Comprehensive
  income............                                     37,386           --            539         37,925
Issuance of common
 stock under
 employee plans.....     429,401        5      4,500                                                 4,505
============================================================================================================

Balance at December
 31, 1998...........  49,414,110  $   495  $  51,496   $153,601  $        --    $    (1,408)   $   204,184
Net income..........                                     45,248                                     45,248
Foreign currency
 translation
 adjustment (net of
 $647 tax benefit)..                                                                 (1,374)        (1,374)
Unrealized loss on
 securities
 available for sale
 (net of $0 tax
 benefit)...........                                                                   (534)          (534)
Unrealized loss on
 derivative
 instruments (net of
 $295 tax benefit)..                                                    (628)                         (628)
                      --------------------------------------------------------------------------------------
 Comprehensive
  income............                                     45,248         (628)        (1,908)        42,712
Issuance of common
 stock under
 employee plans.....     633,072        5      7,334                                                 7,339
============================================================================================================

Balance at December
 31, 1999...........  50,047,182  $   500  $  58,830   $198,849  $      (628)   $    (3,316)   $   254,235

</TABLE>
The accompanying notes are an integral part of these financial statements.

                                      -F6-
<PAGE>

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1: Operations and summary of significant accounting policies

      National  Instruments  Corporation (the "Company") was incorporated on May
14, 1976 under the laws of the State of Texas. On June 10, 1994, the Company was
reincorporated in Delaware.  On March 13, 1995, the Company completed an initial
public offering of shares of its common stock.

      The Company engages in the design, development,  manufacture and marketing
of  instrumentation  software and specialty  interface cards and accessories for
general commercial,  industrial and scientific applications.  The Company offers
hundreds  of  products  used to  create  virtual  instrumentation  systems.  The
Company's  products may be used in  different  environments,  and  consequently,
specific application of the Company's products is determined by the customer and
often is not known to the  Company.  The Company  approaches  all  markets  with
essentially the same products which are used in a variety of  applications  from
research and  development  to production  testing and  industrial  control.  The
following  industries  and  applications  are served  worldwide  by the Company:
advanced research, automotive,  commercial aerospace, computers and electronics,
continuous  process  manufacturing,   education,   government/defense,   medical
research/pharmaceutical, power/energy, semiconductors, automated test equipment,
telecommunications and others.

      Principles of consolidation

      The consolidated  financial statements include the accounts of the Company
and its wholly-owned  subsidiaries.  All significant  intercompany  accounts and
transactions have been eliminated.

      Use of estimates

      Judgments and estimates by management  are required in the  preparation of
financial  statements to conform with generally accepted accounting  principles.
The estimates and underlying  assumptions  affect the reported amounts of assets
and  liabilities,  the disclosure of contingencies at the balance sheet date and
the reported  revenues and expenses for the period.  Actual results could differ
from those estimates.

      Cash and cash equivalents

      Cash and cash equivalents  include cash and highly liquid investments with
maturities of three months or less at the date of acquisition.

      Short-term investments

      Short-term  investments  consist of state and  municipal  securities  with
readily  determinable  fair market  values and original  maturities in excess of
three months. The Company's investments are classified as available-for-sale and
accordingly  are  reported  at fair  value,  with  unrealized  gains and  losses
reported as other  comprehensive  income.  Unrealized losses are charged against
income when a decline in fair value is  determined  to be other than  temporary.
The specific  identification  method is used to determine the cost of securities
sold.

      Inventories

      Inventories are stated at the lower of cost or market.  Cost is determined
using standard costs,  which  approximate the first in, first out (FIFO) method.
Cost  includes  the  acquisition  cost  of  purchased   components,   parts  and
subassemblies,  in-bound freight costs, labor and overhead. Market, with respect
to raw materials,  is replacement cost and, with respect to work-in-process  and
finished goods, is net realizable value.

      Property and equipment

      Property  and  equipment  are recorded at cost.  Depreciation  is computed
using the  straight-line  method over the estimated  useful lives of the assets,
which range from twenty to forty years for buildings and three to five years for
equipment.  Leasehold  improvements are depreciated over the shorter of the life
of the lease or the asset.

                                      -F7-
<PAGE>

      Intangible assets

      The  Company  has  capitalized   costs  related  to  the  development  and
acquisition  of certain  software  products.  In  accordance  with  Statement of
Financial  Accounting  Standards  ("SFAS") No. 86  "Accounting  for the Costs of
Computer Software to Be Sold, Leased or Otherwise  Marketed,"  capitalization of
costs begins when  technological  feasibility has been established and ends when
the product is  available  for general  release to  customers.  Amortization  is
computed on an individual  product basis for those products available for market
and  has  been  recognized  based  on the  product's  estimated  economic  life,
generally  three  years.  Excess  purchase  price  over the fair value of assets
acquired is amortized using the straight-line method over ten years.  Intangible
assets  are  periodically  assessed  for  impairment  of  value  and any loss is
recognized upon impairment.

      Concentrations of credit risk

      Financial   instruments   that   potentially   subject   the   Company  to
concentrations  of credit risk consist  principally of foreign  currency forward
and option  contracts,  cash and cash  equivalents,  short-term  investments and
trade accounts receivable. In management's opinion, no significant concentration
of credit risk exists for the Company.

      The Company's  counterparties  in its foreign  currency forward and option
contracts  are major  financial  institutions.  The Company does not  anticipate
nonperformance  by these  counterparties.  The Company  maintains  cash and cash
equivalents  with  various  financial  institutions  located  in many  countries
worldwide.  Company  policy  is  to  limit  exposure  in  foreign  countries  by
transferring  cash  to  the  U.S.  The  Company's  short-term   investments  are
diversified  among and  limited  to  high-quality  securities  with high  credit
ratings.  Concentration of credit risk with respect to trade accounts receivable
is limited due to the large number of customers and their dispersion across many
countries and industries.  The amount of sales and trade accounts  receivable to
any individual customer was not material for the periods presented.

      Revenue recognition

      Sales  revenue  is  recognized  on the date the  product is shipped to the
customer.  Provision is made for estimated sales returns. Revenue related to the
sale of extended service  contracts is deferred and amortized on a straight-line
basis over the service period.

      In December 1999,  the SEC issued Staff  Accounting  Bulletin  ("SAB") No.
101, Revenue Recognition in Financial Statements,  which the Company is required
to apply  effective  January 1, 2000. SAB No. 101 provides  guidance in applying
generally accepted accounting  principles to certain revenue recognition issues.
The Company is currently  assessing the implications of SAB No. 101 but does not
believe  the impact  will be material  to its  financial  position.  In 1998 the
Company  adopted  the  AICPA  Statement  of  Position  97-2  "Software   Revenue
Recognition"  which did not have a material impact on the  Consolidated  Balance
Sheet or Statement of Income.

      Accounts  receivable are net of allowances  for doubtful  accounts of $4.1
million and $3.7 million at December 31, 1999 and 1998, respectively.

      Warranty expense

      The Company offers a one-year limited  warranty on most hardware  products
and a 90-day warranty on software products, which is included in the sales price
of many of its products.  Provision is made for estimated  future warranty costs
at the time of sale.

      Advertising expense

      The Company  expenses its costs of  advertising  as incurred.  Advertising
expense for the years ended  December 31, 1999,  1998 and 1997 is $34.1 million,
$31.3 million and $27.1 million, respectively.

      Foreign currency translation

      The functional currency for the Company's international  operations is the
applicable  local currency.  The assets and liabilities of these  operations are
translated  at the rate of exchange in effect on the balance  sheet date;  sales
and expenses are translated at average rates. The resultant gains or losses from
translation are included in a separate component of other comprehensive  income.
Gains and  losses  resulting  from  remeasuring  monetary  asset  and  liability
accounts that are denominated in a currency other than a subsidiary's functional
currency are included in determining net income.

                                      -F8-
<PAGE>

      Foreign currency hedging instruments

      The Company adopted SFAS No. 133,  "Accounting for Derivative  Instruments
and Hedging  Activities,"  on January 1, 1999. In accordance with the transition
provisions  of SFAS 133,  the Company  recorded a  net-of-tax  cumulative-effect
adjustment  of $552,000 in current  earnings to recognize  the fair value of its
derivatives designated as cash-flow hedging instruments at the date of adoption.

      All of the Company's derivative  instruments are recognized on the balance
sheet at their fair value.  The Company  currently uses foreign currency forward
and  purchased  option  contracts  to hedge its  exposure  to  material  foreign
currency denominated receivables and planned net foreign currency cash flows.

      On  the  date  the  derivative  contract  is  entered  into,  the  Company
designates  its  derivative  as either a hedge of the fair value of a recognized
asset or liability  ("fair-value"  hedge), as a hedge of the variability of cash
flows to be received  ("cash-flow"  hedge), or as a  foreign-currency  cash-flow
hedge ("foreign-currency" hedge). Changes in the fair value of a derivative that
is highly  effective as - and that is designated and qualifies as - a fair-value
hedge,  along with the loss or gain on the  hedged  asset or  liability  that is
attributable to the hedged risk (including losses or gains on firm commitments),
are  recorded  in  current-period  earnings.  Changes  in the  fair  value  of a
derivative that is highly effective as - and that is designated and qualifies as
- - a cash-flow hedge are recorded in other comprehensive  income,  until earnings
are  affected by the  variability  of cash  flows.  Changes in the fair value of
derivatives  that are highly  effective as - and that are designated and qualify
as - foreign-currency  hedges are recorded in either current-period  earnings or
other  comprehensive  income,  depending on whether the hedge  transaction  is a
fair-value  hedge (e.g., a hedge of a firm commitment that is to be settled in a
foreign  currency) or a cash-flow  hedge (e.g.,  a  foreign-currency-denominated
forecasted transaction). All of the Company's derivative instruments at December
31,  1999  were  designated  as either  foreign-currency  fair  value  hedges or
foreign-currency cash flow hedges.

      The  Company  formally   documents  all   relationships   between  hedging
instruments  and hedged  items,  as well as its  risk-management  objective  and
strategy for  undertaking  various  hedge  transactions.  This process  includes
linking  all  derivatives  that  are  designated  as  fair-value,  cash-flow  or
foreign-currency  hedges to specific assets and liabilities on the balance sheet
or to specific firm  commitments  or forecasted  transactions.  The Company also
formally  assesses,  both at the  hedge's  inception  and on an  ongoing  basis,
whether  the  derivatives  that  are used in  hedging  transactions  are  highly
effective in  offsetting  changes in fair values or cash flows of hedged  items.
When it is determined  that a derivative  is not highly  effective as a hedge or
that it has ceased to be a highly  effective  hedge,  the  Company  discontinues
hedge accounting prospectively, as discussed below.

      The Company  discontinues  hedge accounting  prospectively  when (1) it is
determined that the derivative is no longer  effective in offsetting  changes in
the fair value or cash flows of a hedged item  (including  firm  commitments  or
forecasted  transactions);  (2) the derivative expires or is sold, terminated or
exercised; (3) the derivative is dedesignated as a hedge instrument,  because it
is  unlikely  that a  forecasted  transaction  will  occur;  (4) the hedged firm
commitment  no  longer  meets  the  definition  of a  firm  commitment;  or  (5)
management  determines that  designation of the derivative as a hedge instrument
is no longer appropriate.

      When hedge  accounting is  discontinued  because it is determined that the
derivative no longer qualifies as an effective  fair-value hedge, the derivative
will  continue  to be carried on the balance  sheet at its fair  value,  and the
hedged asset or liability  will no longer be adjusted for changes in fair value.
When hedge  accounting is  discontinued  because the hedged item no longer meets
the definition of a firm commitment,  the derivative will continue to be carried
on the balance  sheet at its fair  value,  and any asset or  liability  that was
recorded pursuant to recognition of the firm commitment will be removed from the
balance sheet and recognized as a gain or loss in current-period  earnings. When
hedge  accounting  is  discontinued  because it is  probable  that a  forecasted
transaction  will not occur,  the derivative  will continue to be carried on the
balance sheet at its fair value,  and gains and losses that were  accumulated in
other comprehensive  income will be recognized  immediately in earnings.  In all
other situations in which hedge accounting is discontinued,  the derivative will
be carried  as its fair value on the  balance  sheet,  with  changes in its fair
value recognized in current-period earnings.

                                      -F9-
<PAGE>

      Income taxes

      The  provision  for income taxes is based on pretax  financial  accounting
income.  Deferred tax assets and liabilities are recognized for the expected tax
consequences  of  temporary  differences  between  the tax bases of  assets  and
liabilities  and their reported  amounts.  Valuation  allowances are established
when necessary to reduce  deferred tax assets to amounts,  which are more likely
than not to be realized.

      Earnings per share

      On July 22, 1999, the Company  declared a stock split effected in the form
of a dividend of one share of common  stock for each two shares of common  stock
outstanding. The dividend was paid on August 20, 1999 to holders of record as of
the close of  business  on August 5,  1999.  All per share  data and  numbers of
common shares,  where appropriate,  have been retroactively  adjusted to reflect
the stock split.

      Basic earnings per share ("EPS") is computed by dividing net income by the
weighted average number of common shares outstanding during each period. Diluted
EPS is computed by dividing net income by the weighted  average number of common
shares and common  share  equivalents  outstanding  (if  dilutive)  during  each
period.  Common share  equivalents  include stock options.  The number of common
share  equivalents  outstanding  relating to stock options is computed using the
treasury stock method.

      The reconciliation of the denominators used to calculate the basic EPS and
diluted EPS for the years ended December 31, 1999,  1998 and 1997,  respectively
are as follows (in thousands):

                                        Years Ended December 31,
                                      ----------------------------
                                        1999      1998      1997
                                      --------  --------  --------
Weighted average shares
outstanding-basic................       49,776    49,248    48,845

Plus: Common share equivalents
  Stock options..................        2,427     1,902     1,639
                                      --------  --------  --------

Weighted average shares
outstanding-diluted..............       52,203    51,150    50,484
                                      ========  ========  ========

      Stock options to acquire 57,783, 1,144,686 and 21,428 shares for the years
ended December 31, 1999,  1998 and 1997,  respectively  were not included in the
computations of diluted earnings per share because the effect of including stock
options would have been anti-dilutive.

      Stock-based compensation plans

      The Company has adopted the  disclosure-only  provisions  of SFAS No. 123,
"Accounting  for  Stock-Based  Compensation."  As allowed by SFAS No.  123,  the
Company continues to apply the provisions of Accounting Principles Board Opinion
No. 25,  "Accounting for Stock issued to Employees" and related  interpretations
in accounting for its plans. Accordingly, compensation cost for stock options is
measured as the  excess,  if any, of the quoted  market  price of the  Company's
stock at the date of the grant over the amount an  employee  must pay to acquire
the stock.

      Comprehensive income

      In June 1997, the Financial  Accounting  Standards  Board ("FASB")  issued
SFAS  No.  130,  "Reporting  Comprehensive  Income."  The  standard,  which  was
effective for financial  statements issued for periods ending after December 15,
1997,   established  standards  for  reporting,   in  addition  to  net  income,
comprehensive  income  and its  components  including,  as  applicable,  foreign
currency items,  minimum pension liability  adjustments and unrealized gains and
losses on certain investments in debt and equity securities. The Company adopted
this  standard  in the first  quarter  of 1998 and has  reclassified  prior year
financial statements to reflect the provisions of this statement.

                                     -F10-
<PAGE>

Note 2: Short-term investments

      Short-term  investments at December 31, 1999 and 1998, consisting of state
and municipal  securities,  were acquired at an aggregate  cost of $81.5 million
and $49.1 million, respectively. The contractual maturities of these securities,
which are  classified as  available-for-sale  and carried at fair value,  are as
follows (in thousands):

                                                       December 31,
                                                  ----------------------
                                                     1999        1998
                                                  ----------  ----------
      90 days to one year...........              $  26,989   $  26,639
      One year through two years....                 41,681      22,519
      Two years through three years.                 14,855          --
                                                  ----------  ----------
                                                  $  83,525   $  49,158
                                                  ==========  ==========

Note 3: Inventories

      Inventories consist of the following (in thousands):

                                                       December 31,
                                                  ----------------------
                                                     1999        1998
                                                  ----------  ----------
      Raw materials.................              $  11,115   $   7,194
      Work-in-process...............                  2,402         943
      Finished goods................                 12,644       8,317
                                                  ----------  ----------
                                                  $  26,161   $  16,454
                                                  ==========  ==========

Note 4: Property and equipment

      Property and equipment consist of the following (in thousands):

                                                       December 31,
                                                  ----------------------
                                                     1999        1998
                                                  ----------  ----------
      Land..........................              $   4,006   $   4,006
      Buildings.....................                 45,013      43,894
      Furniture and equipment.......                 68,595      56,956
                                                  ----------  ----------
                                                    117,614     104,856
      Accumulated depreciation......                (47,843)    (38,725)
                                                  ----------  ----------
                                                  $  69,771   $  66,131
                                                  ==========  ==========

      Depreciation expense for the years ended December 31, 1999, 1998 and 1997,
is $10.5 million, $8.9 million and $7.1 million, respectively.

Note 5: Intangibles and other assets

      Intangibles  at December  31, 1999 and 1998 include  capitalized  software
development costs of $4.4 million and $3.9 million, respectively,  which are net
of accumulated amortization of $6.0 million and $3.8 million,  respectively, and
goodwill of $7.5 million in 1999 (net of accumulated  amortization of $180,000).
Total  amortization  costs were $2.5 million,  $2.8 million and $1.6 million for
the years ended December 31, 1999,  1998 and 1997,  respectively.  Substantially
all of these amounts were amortization of software development costs.

                                     -F11-
<PAGE>

Note 6: Debt

      Debt consists of the following (in thousands):             December 31,
                                                              ------------------
                                                                1999      1998
                                                              --------  --------
      Short-term debt:  Revolving line, LIBOR (6.4% at
       December 31, 1999), $20,000,000 commitment,
       matures December 29, 2000........................      $    --   $    --
                                                              ========  ========
      Long-term debt: Manufacturing facility loan, LIBOR
       (6.4% at December 31, 1999), $8,480,000
       commitment, half the principal is payable,
       together with interest, in equal quarterly
       installments over a five-year term, beginning
       September 1995, remainder due at maturity at
       February 28, 2001................................      $ 4,515   $ 5,151
      Other.............................................          662        77
                                                              --------  --------
      Total debt........................................        5,177     5,228
         Less current portion...........................          876       849
                                                              --------  --------
      Long-term portion.................................      $ 4,301   $ 4,379
                                                              ========  ========

      The terms of the Company's  debt  agreements  include  various  covenants,
which  require,  among  other  things,  a minimum  tangible  net worth of $220.2
million.  Collateral is in land and buildings of the manufacturing and corporate
headquarter site.

      Long-term  debt  maturing  in years  2000 and  2001 is  $876,000  and $4.3
million, respectively.

Note 7: Income taxes

      The  components  of income  before the  provision  for income taxes are as
follows (in thousands):

                                     Years Ended December 31,
                                   ----------------------------
                                     1999      1998      1997
                                   --------  --------  --------
      Domestic..........           $57,189   $46,817   $42,400
      Foreign...........            10,164     8,983     7,787
                                   --------  --------  --------
                                   $67,353   $55,800   $50,187
                                   ========  ========  ========

      The  provision  for income taxes  charged to  operations is as follows (in
thousands):

                                     Years Ended December 31,
                                   ----------------------------
                                     1999      1998      1997
                                   --------  --------  --------
      Current tax expense
         U.S. federal...           $17,858   $11,945   $15,140
         State..........             1,165     1,109     1,468
         Foreign........             1,732     3,831     3,026
                                   --------  --------  --------
      Total current.....            20,755    16,885    19,634
                                   --------  --------  --------
      Deferred tax expense
       (benefit)
         U.S. federal...             1,394     2,352    (2,719)
         State..........               115       329      (227)
         Foreign........              (711)   (1,152)     (126)
                                   --------  --------  --------
      Total deferred....               798     1,529    (3,072)
                                   --------  --------  --------
      Total provision...           $21,553   $18,414   $16,562
                                   ========  ========  ========

                                     -F12-
<PAGE>

Deferred tax  liabilities  (assets) at December 31, 1999 and 1998 are as follows
(in thousands):

                                                    December 31,
                                               ----------------------
                                                  1999        1998
                                               ----------  ----------
      Capitalized software..............       $   1,194   $   1,068
      Unrealized exchange gain..........              --         192
      Depreciation and amortization.....             164          --
      Undistributed earnings of foreign
       subsidiaries.....................             616          --
                                               ----------  ----------
         Gross deferred tax liabilities.           1,974       1,260
                                               ----------  ----------
      Depreciation and amortization.....              --        (311)
      Operating loss carryforwards......          (1,563)     (1,774)
      Vacation and other accruals.......          (1,711)     (1,358)
      Inventory valuation and warranty
       provisions.......................          (1,853)     (1,246)
      Doubtful accounts and sales
       provisions.......................          (1,413)     (1,311)
      Unrealized exchange loss..........            (137)         --
      Intercompany profit...............            (782)       (599)
      Undistributed earnings of foreign
       subsidiaries.....................              --        (525)
      Other.............................            (462)       (615)
                                               ----------  ----------
         Gross deferred tax assets......          (7,921)     (7,739)
                                               ----------  ----------
      Valuation allowance...............             292         303
                                               ----------  ----------
      Net deferred tax asset............       $  (5,655)  $  (6,176)
                                               ==========  ==========

     A reconciliation  of income taxes at the U.S. federal  statutory income tax
rate to the effective tax rate follows:
                                                        Years Ended December 31,
                                                        ------------------------
                                                         1999     1998     1997
                                                        ------   ------   ------
      U.S. federal statutory tax rate...............      35 %     35 %     35 %
      Foreign sales corporation benefit.............      (2)      (2)      (1)
      Foreign taxes less than federal statutory rate      (1)      --       --
      Foreign tax credits utilized..................      --       --       (1)
      Tax exempt interest...........................      (2)      (2)      (2)
      State income taxes, net of federal tax benefit       2        2        2
                                                        ------   ------   ------
         Effective tax rate...................            32 %     33 %     33 %
                                                        ======   ======   ======

      As of  December  31,  1999,  seven  of  the  Company's  subsidiaries  have
available, for income tax purposes,  foreign net operating loss carryforwards of
approximately $4.2 million, of which $3.1 million expire during the years 2002 -
2008 and $1.1 million of which may be carried forward indefinitely.

      A deferred  income tax  expense of $251,000  was  provided in 1999 for the
estimated  U.S.  federal  taxes  that will be paid upon the  anticipated  future
repatriation of approximately $2.4 million of foreign undistributed  earnings in
the form of dividends.  The Company has not provided for U.S. federal income and
foreign   withholding   taxes  on   approximately   $1.9   million  of  non-U.S.
subsidiaries'  undistributed  earnings as of December  31,  1999,  because  such
earnings are intended to be reinvested indefinitely. These earnings would become
subject to U.S. tax and foreign  withholding tax, if they are actually or deemed
to be remitted to the parent  company as dividends or if the Company should sell
its stock in these subsidiaries. If these earnings were distributed, foreign tax
credits  should  become  available  under current law to reduce or eliminate the
resulting U.S. income tax and foreign withholding tax liabilities.

Note 8: Acquisitions

     On August 31, 1999, the Company  acquired all of the issued and outstanding
shares of common  stock of GfS  Systemtechnik  GmbH and related  companies.  The
acquisition was accounted for as a purchase. The Company recorded a $2.1 million
pre-tax  charge  against  earnings  during  the  third  quarter  of 1999 for the
write-off of in-process  GfS research and  development  technology  that had not
reached the working  model  stage.  The Company  also  recorded  $1.1 million of
capitalized  software  development costs and $7.7 million of goodwill related to
the  acquisition,  which are  included in  intangibles  and other assets and are
being   amortized  on  a  straight  line  basis  over  5  years  and  10  years,
respectively.

                                     -F13-
<PAGE>

      GfS has developed  software  products that are focused on the  measurement
and automation needs of the automotive  industry.  Its flagship software product
is DIAdem,  an easy to use rapid  development  environment for data acquisition,
monitoring,  visualization,  open and closed loop control, analysis,  automation
and  documentation.  The Company  allocated  approximately  $12.4 million of the
purchase price to net assets, developed technology,  workforce and goodwill. The
Company allocated approximately $2.1 million to acquired in-process research and
development (IPR&D).  Seventy-eight percent of the acquired IPR&D pertain to the
development  of  ASAM  interface  functionality  demanded  from  all  automotive
companies as well as developing a 32-bit  enhanced  version of DIAdem.  Specific
enhancements include a new interface for DIAdem DATA, improvements to the NI-DAQ
packet  processing  driver and  improvements  in the ASAM  navigator.  As of the
acquisition  date, the expected  costs to complete the IPR&D were  approximately
$650,000 in 1999 and $200,000 in 2000.

      On August 17, 1998, the Company acquired all of the issued and outstanding
shares of common  stock of  DATALOG  GmbH/DASYtec  GmbH  (Datalog)  and  related
subsidiaries for an aggregate purchase price of approximately $2.2 million.  The
acquisition was accounted for as a purchase.  The Company amortized  $750,000 of
the  purchased  software  during the third  quarter of 1998.  This  amortization
period  was  utilized  due to the  nature of this  technology  and timing of the
revenue streams associated with it.

      In 1997, the Company  acquired the products,  technology and net assets of
nuLogic,  Inc. for a purchase price of  approximately  $2.0 million in cash. The
acquisition was accounted for as a purchase. The Company recorded a $1.4 million
pre-tax  charge  against  earnings  during  the  third  quarter  of 1997 for the
write-off of in-process nuLogic research and development technology that had not
reached the working model stage.

      The consolidated  financial  statements  include the operating  results of
each business from the date of acquisition.  Proforma  results of operation have
not been presented because the effects of those operations were not material.

Note 9: Stockholders' equity

      Common stock

      On October 15, 1997,  the Company  declared a stock split  effected in the
form of a dividend of one share of common stock for each two shares outstanding.
The  dividend was paid on November 12, 1997 to holders of record as of the close
of business on October 28, 1997.

      On July 22, 1999, the Company  declared a stock split effected in the form
of a dividend of one share of common  stock for each two shares of common  stock
outstanding. The dividend was paid on August 20, 1999 to holders of record as of
the close of business on August 5, 1999.

      All share information included in the accompanying  consolidated financial
statements and notes has been retroactively adjusted to reflect the exchange and
stock splits.

      Stock-based compensation plans

      At December 31, 1999, the Company has two active stock-based  compensation
plans and one inactive plan. The two active  stock-based  compensation plans are
the 1994  Incentive  Stock Option Plan and the Employee  Stock Purchase Plan. No
compensation cost has been recognized in the Company's financial  statements for
the fixed stock option plan and the stock  purchase plan. If  compensation  cost
for the  Company's two active  stock-based  compensation  plans were  determined
based  on the  fair  value  at the  grant  date for  awards  under  those  plans
consistent with the method established by SFAS No. 123, the Company's net income
and  earnings  per share  would  have  been  reduced  to the pro  forma  amounts
indicated below (in thousands, except per share data).

                                                Years Ended December 31,
                                             -----------------------------
                                               1999       1998      1997
                                             --------   --------  --------
Net income                    As reported    $45,248    $37,386   $33,625
                              Pro-forma       38,742     31,281    29,829

Basic earnings per share      As reported    $  0.91    $  0.76   $  0.69
                              Pro-forma         0.78       0.63      0.61

Diluted earnings per share    As reported    $  0.87    $  0.73   $  0.67
                              Pro-forma         0.74       0.61      0.59

                                     -F14-
<PAGE>

      Stock option plans

      The  stockholders of the Company  approved the 1994 Incentive Stock Option
Plan on May 9, 1994. At the time of approval,  6,075,000 shares of the Company's
common stock were reserved for issuance  under this plan. In 1997, an additional
4,725,000  shares of the Company's common stock were reserved for issuance under
this plan.  The 1994 Plan,  administered  by the  Compensation  Committee of the
Board of  Directors,  provides for  granting of incentive  awards in the form of
stock options to directors,  executive officers and employees of the Company and
its subsidiaries.  Awards under the plan must be granted within ten years of the
effective date of the 1994 Plan.  Options granted may be either  incentive stock
options  within the  meaning  of Section  422 of the  Internal  Revenue  Code or
nonqualified options. The right to purchase shares vests over a five to ten year
period,  beginning on the date of grant.  Stock options must be exercised within
ten years from date of grant.  Stock  options are issued at market  price at the
grant date. Shares available for grant at December 31, 1999 were 4,567,423.

      Transactions under all plans are summarized as follows:

                                                  Number of         Weighted
                                                 shares under   average exercise
                                                    option           price
                                                 ------------   ----------------
      Outstanding at December 31, 1996.           3,011,147     $      7.59
         Exercised.....................             (94,131)           7.68
         Canceled......................            (227,847)          10.31
         Granted.......................           1,868,103           14.73
                                                 ------------   ----------------
      Outstanding at December 31, 1997.           4,557,272           10.38
         Exercised.....................            (244,691)           5.11
         Canceled......................            (202,313)          14.57
         Granted.......................           1,481,866           22.53
                                                 ------------   ----------------
      Outstanding at December 31, 1998.           5,592,134           13.69
         Exercised.....................            (498,514)           9.94
         Canceled......................            (522,905)          16.22
         Granted.......................             946,247           20.41
                                                 ------------   ----------------
      Outstanding at December 31, 1999.           5,516,962     $     14.95
                                                 ============   ================

      Options exercisable at December 31:

         1997..........................           1,202,955     $      8.05
         1998..........................           1,855,802           10.29
         1999..........................           2,398,305           11.99

                                                                    Weighted
      Weighted average, grant date fair value                     average fair
      of options granted during:                                     value
                                                                ----------------
         1997..........................           1,868,103     $      6.77
         1998..........................           1,481,866           10.33
         1999..........................             946,247            8.57

                                December 31, 1999
- --------------------------------------------------------------------------------
                Options Outstanding                      Options Exercisable
- --------------------------------------------------  ----------------------------

                                        Weighted
                             Weighted    Average
                  Number     average    remaining    Number of      Weighted
  Exercise      of options   exercise  contractual    options       average
    price       outstanding   price     life (yrs)  exercisable  exercise price
- --------------  -----------  --------  -----------  -----------  --------------
$ 6.44 -  8.78     865,844   $   6.55       5          675,159    $    6.54
  8.89 - 14.06   1,159,714       9.19       6          714,709         9.17
 14.44 - 14.44   1,245,958      14.44       7          542,539        14.44
 14.83 - 18.00     158,788      16.53       8           53,398        16.26
 18.33 - 33.00   2,086,658      21.83       9          412,500        22.01
  6.44 - 33.00   5,516,962      14.95       7        2,398,305        11.99

                                     -F15-
<PAGE>

      The fair  value of each  option  grant is  estimated  on the date of grant
using the Black-Scholes option-pricing model with the following weighted-average
assumptions:

                                      1999        1998        1997
                                   ----------  ----------  ----------
      Dividend expense yield..             0%          0%          0%
      Expected life...........        5 years     5 years   7.2 years
      Expected volatility.....          35.5%       33.3%       30.6%
      Risk-free interest rate.           4.8%        5.6%        6.3%

      Employee stock purchase plan

      The Company's stock purchase plan became effective March 13, 1995 upon the
first date of  registration  of the  Company's  Common  Stock.  The plan permits
substantially all domestic employees and employees of designated subsidiaries to
acquire the  Company's  Common Stock at a purchase  price of 85% of the lower of
the market price at the beginning or the end of the  participation  period.  The
semi-annual  periods begin on October 1 and April 1 of each year.  Employees may
designate  up to 15% of their  compensation  for the  purchase of Common  Stock.
Common Stock reserved for future employee purchases  aggregated 2,607,523 shares
at December 31, 1999.  Shares  issued under this plan were 208,649 in 1999.  The
fair  value  of  the  employees'   purchase   rights  was  estimated  using  the
Black-Scholes model with the following assumptions:

                                      1999        1998        1997
                                   ----------  ----------  ----------
      Dividend expense yield..             0%          0%          0%
      Expected life...........       6 months    6 months    6 months
      Expected volatility.....            38%         40%         50%
      Risk-free interest rate.           4.2%        5.3%        5.2%

      Weighted average, grant date fair value
      of purchase rights granted under the        Number of     Weighted average
      Employee Stock Purchase Plan:                shares          fair value
                                                ------------    ----------------
           1997.....................               176,060        $    5.12
           1998.....................               195,179             5.16
           1999.....................               160,830             6.79

      Stockholders' rights plan

      The Board of Directors  and  stockholders  approved and adopted the Rights
Agreement prior to the Company's  initial public offering (the  "offering").  On
March 13,  1995,  the  effective  date of the  offering,  the Board of Directors
declared a dividend  distribution  of one common share  purchase  right for each
outstanding  share of Common Stock. The rights become  exercisable under certain
conditions  involving  acquisition of the Company's Common Stock.  Under certain
other conditions  where the Company is consolidated or merged,  each holder of a
right shall have the right to  receive,  upon  exercise of the right,  shares of
Common Stock of the Company,  or acquiring company,  having a value of twice the
exercise  price of the right.  The rights  expire on March 13, 2005,  and may be
redeemed  in whole by the Company  for $.01 per right.  The rights are  excluded
from earnings per share  computations  because they qualify as contingent shares
and therefore are excluded as long as the  conditions  that require  issuance of
the shares are not imminent.

Note 10: Employee retirement plan

      The Company has a defined contribution retirement plan pursuant to Section
401(k) of the Internal Revenue Code.  Substantially all domestic  employees with
at least one year of  continuous  service are  eligible to  participate  and may
contribute up to 15% of their  compensation.  The Board of Directors has elected
to make matching contributions equal to 50% of employee contributions, which may
be  applied,  to a maximum  of 6% of each  participant's  compensation.  Company
contributions vest immediately.  Company  contributions  charged to expense were
$1,087,000, $933,000 and $799,000 in 1999, 1998 and 1997, respectively.

                                     -F16-
<PAGE>

Note 11: Financial instruments

      Fair value of financial instruments

      The estimated fair value amounts  disclosed  below have been determined by
the Company using  available  market  information  and  valuation  methodologies
described  below.  However,  considerable  judgment is required in  interpreting
market data to develop these estimates of fair value. Accordingly, the estimates
presented herein are not necessarily  indicative of the amounts that the Company
could  realize  in a  current  market  exchange.  The  use of  different  market
assumptions  could  have a  significant  effect on the  estimates.  For  certain
financial  instruments  of the  Company,  including  cash and cash  equivalents,
accounts  receivable,  accounts  payable,  accrued  liabilities  and the current
portion of long-term  debt, the carrying amount  approximates  fair value due to
the short-term  maturity of these instruments.  The estimated fair values of the
other assets  (liabilities) of the Company's remaining financial  instruments at
December 31, 1999 and 1998 are as follows (in thousands):

                                                    December 31,
                                    ------------------------------------------
                                            1999                  1998
                                    --------------------  --------------------
                                     Carrying    Fair      Carrying    Fair
                                      Amount     Value      Amount     Value
                                    --------------------  --------------------
      Short-term investments.....   $ 83,525   $ 83,525   $ 49,158   $ 49,158

      Other assets/liabilities:
         Forward contracts.......        (41)       (41)    (1,151)    (1,151)
         Purchased options.......         --         --      1,194        467
      Long-term debt.............     (4,301)    (3,884)    (4,379)    (3,899)

      The fair values of short-term  investments  and foreign  currency  forward
contracts  were  estimated  based upon quotes from brokers as of the  applicable
balance  sheet  date.  The  fair  value  of  long-term  debt  was  estimated  by
discounting  the future cash flows using rates  currently  available for debt of
similar terms and maturity.

Note 12: Derivative instruments and hedging activities

      The Company has  operations in over 34 countries.  Forty-seven  percent of
the Company's revenues are generated from international customers. The Company's
activities  expose it to a variety of market  risks,  including  the  effects of
changes in  foreign-currency  exchange rates and interest rates. These financial
risks are  monitored  and  managed  by the  Company as an  integral  part of its
overall risk management program.

      The Company  maintains a  foreign-currency  risk management  strategy that
uses derivative  instruments  (foreign  currency  forward and purchased  options
contracts) to protect its interests from unanticipated  fluctuations in earnings
and cash flows caused by the volatility in currency exchange rates. Movements in
foreign-currency  exchange  rates pose a risk to the  Company's  operations  and
competitive position,  since exchange rate changes may affect the profitability,
cash flow, and business and/or pricing strategies of non-U.S. based competitors.

      Foreign currency fair value and cash flow hedges

      The  Company's  foreign  sales are  denominated  in the  customers'  local
currency.  The Company  purchases foreign currency forward and purchased options
contracts  as  hedges of  anticipated  sales  that are  denominated  in  foreign
currencies  and as hedges of foreign  currency  denominated  receivables.  These
contracts  are  entered  into to  protect  against  the risk  that the  eventual
dollar-net-cash  inflows  resulting from such sales or firm  commitments will be
adversely affected by changes in exchange rates.

      At December 31, 1999,  the Company held forward  contracts with a notional
amount of $39.3  million that were  designated  as foreign  currency  fair value
hedges of the Company's foreign denominated receivables.  These contracts, which
are for 90 day  periods,  had a carrying  amount of $881,000  and a net realized
gain of $881,000 recorded in the "Net Foreign Exchange Gain/(Loss)" line item in
the  Consolidated  Statement  of  Income.  The  Company  hedges up to 90% of its
outstanding foreign denominated receivables.

      At December 31, 1999,  the Company held forward  contracts with a notional
amount of $125.4  million that were  designated  as foreign  currency  cash flow
hedges related to the Company's anticipated sales transactions. These contracts,
which are for terms up to twenty-four  months,  had a pre-tax carrying amount of
$(923,000)  and  a  net  unrealized   deferred  loss  of  $923,000  recorded  in
"Accumulated Other Comprehensive  Income" line item in the Consolidated  Balance
Sheet.  Based on the Company's  estimates of future foreign  exchange  rates, it
hedges between 65% and 80% of  anticipated  net cash inflows for the following 3
to 24 months.

                                     -F17-
<PAGE>

      As of  December  31,  1999,  $1,570,000  of deferred  gains on  derivative
instruments  recorded in Accumulated Other Comprehensive  Income are expected to
be reclassified  to earnings  during the next twelve months.  The actual foreign
sales  expected  to occur  over the next  twelve  months  will  necessitate  the
reclassifying to earnings of these derivative gains.

      For the year ended December 31, 1999, the Company recognized a net loss of
$253,000  (reported in the "Net Foreign Exchange  Gain/(Loss)"  line item in the
Consolidated  Statement of Income),  which represented the total ineffectiveness
of all cash-flow hedges.

Note 13: Segment information

      In 1998, the Company adopted SFAS No. 131,  "Disclosures about Segments of
an  Enterprise  and  Related  Information."  SFAS 131  supersedes  SFAS  No.  14
"Financial  Reporting  for  Segments of a Business  Enterprise",  replacing  the
"industry  segment"  approach with the  "management"  approach.  The  management
approach  designates  the internal  organization  that is used by management for
making  operating  decisions  and  assessing  performance  as the  source of the
Company's reportable  segments.  It also requires disclosures about products and
services, geographic areas and major customers.

      While the  Company  sells its  products  to many  different  markets,  its
management  has chosen to organize  the Company by  geographic  areas,  and as a
result has determined that it has one reportable  segment.  Substantially all of
the interest income, interest expense, depreciation and amortization is recorded
in  North  America.  Net  sales,   operating  income  and  identifiable  assets,
classified by the major geographic areas in which the Company  operates,  are as
follows (in thousands):

                                          Years Ended December 31,
                                     ----------------------------------
                                        1999        1998        1997
                                     ----------  ----------  ----------
Net sales:
North America:
  Unaffiliated customer sales...     $ 175,873   $ 153,435   $ 141,180
  Geographic transfers..........        41,739      32,451      29,128
                                     ----------  ----------  ----------
                                       217,612     185,886     170,308
                                     ----------  ----------  ----------
Europe:
  Unaffiliated customer sales...       108,801      86,961      66,318
                                     ----------  ----------  ----------
Asia Pacific:
  Unaffiliated customer sales...        44,909      33,834      33,381
                                     ----------  ----------  ----------
Eliminations....................       (41,739)    (32,451)    (29,128)
                                     ----------  ----------  ----------
                                     $ 329,583   $ 274,230   $ 240,879
                                     ==========  ==========  ==========

                                          Years Ended
                                          December 31,
                                     ----------------------
                                        1999        1998
                                     ----------  ----------
Operating income:
North America...................     $  48,679   $  44,669
Europe..........................        39,603      29,964
Asia Pacific....................        20,117      13,172
Unallocated:
Research and development
expenses........................       (45,531)    (34,757)
                                     ----------  ----------
                                     $  62,868   $  53,048
                                     ==========  ==========

      The Company's  segment  operating income  disclosure for 1999 and 1998 has
been conformed to the presentation required by SFAS No. 131. Management believes
that the cost to develop  comparative  segment operating income  information for
1997 would be excessive and accordingly, will not be presented.

                                          December 31,
                                     ----------------------
                                        1999        1998
                                     ----------  ----------
Identifiable assets:
North America...................     $ 261,709   $ 204,215
Europe..........................        34,457      29,978
Asia Pacific....................        22,587      15,593
                                     ----------  ----------
                                     $ 318,753   $ 249,786
                                     ==========  ==========

                                     -F18-
<PAGE>

Note 14: Commitments and contingencies

      The Company has commitments under noncancelable operating leases primarily
for office  facilities  and  equipment.  Future  minimum  lease  payments  as of
December  31,  1999,  for  each  of the  next  five  years  are as  follows  (in
thousands):

           2000........................        $    950
           2001........................             831
           2002........................             789
           2003........................             477
           2004........................             432
           Thereafter..................              --
                                               ---------
                                               $  3,479
                                               =========

      Rent expense under operating leases was approximately  $3.6 million,  $2.6
million and $5.0 million for the years ended  December 31, 1999,  1998 and 1997,
respectively.

Note 15: Quarterly results (unaudited)

      The  following   quarterly   results  have  been  derived  from  unaudited
consolidated  financial  statements that, in the opinion of management,  reflect
all adjustments  (consisting only of normal recurring adjustments) necessary for
a fair presentation of such quarterly information. The operating results for any
quarter are not  necessarily  indicative  of the results to be expected  for any
future  period.  The unaudited  quarterly  financial  data for each of the eight
quarters in the two years ended  December 31, 1999 are as follows (in thousands,
except per share data):

                                                 Three Months Ended
                                  ----------------------------------------------
                                     March       June        Sept.       Dec.
                                      31,         30,         30,         31,
                                     1999        1999        1999        1999
                                  ----------  ----------  ----------  ----------
Net sales.......................  $  73,686   $  79,777   $  82,724   $  93,396
Gross profit....................     56,746      61,658      63,176      71,963
Operating income................     15,166      15,883      12,841      18,978
Income before cumulative effect
  of accounting change..........     10,560      11,257       9,946      14,037
Net income......................     10,008      11,257       9,946      14,037

Basic earnings per share:
  Income before cumulative
    effect of accounting change.  $    0.21   $    0.23   $    0.20   $    0.28
  Cumulative effect of
    accounting change, net of
    tax.........................      (0.01)         --          --          --
                                  ----------  ----------  ----------  ----------
  Basic earnings per share......  $    0.20   $    0.23   $    0.20   $    0.28
                                  ==========  ==========  ==========  ==========

Diluted earnings per share:
  Income before cumulative
    effect of accounting change.  $    0.20   $    0.22   $    0.19   $    0.27
  Cumulative effect of
    accounting change, net of
    tax.........................      (0.01)         --          --          --
                                  ----------  ----------  ----------  ----------
  Diluted earnings per share....  $    0.19   $    0.22   $    0.19   $    0.27
                                  ==========  ==========  ==========  ==========

Weighted average shares
outstanding:

  Basic.........................     49,484      49,725      49,855      50,029
  Diluted.......................     51,339      51,866      52,570      52,802

                                                 Three Months Ended
                                  ----------------------------------------------
                                     March       June        Sept.       Dec.
                                      31,         30,         30,         31,
                                     1998        1998        1998        1998
                                  ----------  ----------  ----------  ----------
Net sales.......................  $  65,353   $  67,770   $  67,874   $  73,233
Gross profit....................     49,784      51,681      51,588      55,990
Operating income................     12,784      13,033      11,994      15,237
Net income......................      8,831       9,198       8,527      10,830
Basic earnings per share........  $    0.18   $    0.19   $    0.17   $    0.22
Weighted average shares
  outstanding-basic.............     49,002      49,200      49,275      49,401
Diluted earnings per share......  $    0.17   $    0.18   $    0.17   $    0.21
Weighted average shares
  outstanding-diluted..........      51,150      51,300      50,925      51,150

                                     -F19-
<PAGE>

                                   SCHEDULE II
                        NATIONAL INSTRUMENTS CORPORATION
                      VALUATION AND QUALIFYING ACCOUNTS(1)

                                 (In thousands)

Allowance for doubtful accounts

                                  Balance    Provision                Balance
                                    at          for      Write-Offs     at
                                 Beginning    Bad Debt   Charged to   End of
Year        Description          of Period    Expense    Allowances   Period
- ----    ----------------------   ---------   ----------  ----------  ---------
1997    Allowance for doubtful
        accounts                 $  2,420    $   1,914   $     334   $  4,000
1998    Allowance for doubtful
        accounts                    4,000          183         513      3,670
1999    Allowance for doubtful
        accounts                    3,670        1,455         982      4,143

Valuation allowances for excess and obsolete inventory

                                  Balance    Provision                Balance
                                    at          for      Write-Offs     at
                                 Beginning    Bad Debt   Charged to   End of
Year        Description          of Period    Expense    Allowances   Period
- ----    ----------------------   ---------   ----------  ----------  ---------
1997    Valuation allowances
        for excess and
        obsolete inventory       $  1,846    $   1,829   $     515   $  3,160
1998    Valuation allowances
        for excess and
        obsolete inventory          3,160           --       1,356      1,804
1999    Valuation allowances
        for excess and
        obsolete inventory          1,804        1,244         694      2,354


(1)  Deferred  tax assets  valuation  is omitted as required  information.  This
     information is shown in Note 7 to the consolidated financial statements.


                                                                    EXHIBIT 10.5

                        FIRST AMENDMENT TO LOAN AGREEMENT
                               AND PROMISSORY NOTE

      THIS  FIRST   AMENDMENT  TO  LOAN  AGREEMENT  AND  PROMISSORY   NOTE  (the
"Amendment"),  dated as of December  31,  1999,  is entered  into by and between
NATIONAL  INSTRUMENTS  CORPORATION,  a Delaware corporation (the "Borrower") and
BANK OF AMERICA, N.A., successor by merger to NationsBank, N.A. (the "Bank").

                                    RECITALS

     A. The  Borrower and the Bank are parties to a Loan  Agreement  dated as of
June 30, 1998 (the "Loan  Agreement")  pursuant  to which the Bank has  extended
certain  credit  facilities  to  the  Borrower.  In  connection  with  the  Loan
Agreement, the Borrower has given the Bank a Promissory Note dated June 30, 1998
(the "Note") in the principal amount of $20,000,000.

     B. The  Borrower has  requested  that the Bank agree to an extension of the
maturity date under the Loan  Agreement  and the Note (the "Credit  Documents").

     C. The  Bank is  willing  to so  extend  the  maturity  date of the  Credit
Documents, subject to the terms and conditions of this Amendment.

     NOW,  THEREFORE,  for valuable  consideration,  the receipt and adequacy of
which are hereby acknowledged, the parties hereto hereby agree as follows:

     1. Defined Terms.  Unless otherwise defined herein,  capitalized terms used
herein shall have the meanings, if any, assigned to them in the Loan Agreement.

     2. Amendments to Loan Agreement.

          (a) Section 1.D. of the Loan  Agreement  shall be amended and restated
     in its entirety to read as follows:

          "Business  Day" shall mean any day other  than a  Saturday,  Sunday or
          other day on which commercial banks in Austin, Texas or San Francisco,
          California  are  authorized  or required by law to close,  and, if the
          applicable Business Day relates to:

               (a) an obligation  denominated in Dollars,  any such day on which
          dealings are carried on in the London interbank market;

               (b) an obligation denominated in the euro, any such day which is:

                    (i) for payments or purchases of the euro, a TARGET Business
               Day; and

                    (ii) for all other purposes,  including  without  limitation
               the giving and receiving of notices hereunder,  a TARGET Business
               Day on which  banks are  generally  open for  business in London,
               Frankfurt and in any other principal financial center as Bank may
               from time to time determine for this purpose; and

               (c) an obligation  denominated in any other foreign currency, any
          such day on which  commercial  banks  are  open for  foreign  exchange
          business in London,  England,  and on which  dealings in the  relevant
          foreign  currency are carried on in the  applicable  offshore  foreign
          exchange  interbank market in which disbursement of or payment in such
          foreign currency will be made or received hereunder.

          A "TARGET Business Day" is a day when TARGET (Trans-European Automated
          Real-time Gross settlement Express Transfer system),  or any successor
          thereto, is scheduled to be open for business.

          (b) The following defined term shall be added as Section 1.G.1. of the
     Loan Agreement after Section 1.G. thereof:

          "Dollar Equivalent" shall mean, with respect to any amount denominated
          in a foreign  currency,  the amount of Dollars  that can be  purchased
          with  such  foreign  currency  at the spot  rate for  delivery  on the
          relevant  calculation  date, where the spot rate is the rate quoted by
          Bank as the spot rate for the  purchase  by Bank of Dollars  with such
          currency  through  its FX Trading  Office at  approximately  8:00 a.m.
          (California  time) on the date which is two Business Days prior to the
          calculation date.

          (c) Section 1.S. of the Loan  Agreement  shall be amended by inserting
     the date "December 29, 2000" instead of the date "December 31, 1999."

<PAGE>

          (d) Section 1.W. of the Loan  Agreement  shall be amended and restated
     in its entirety to read as follows:

          "Tangible  Net  Worth"  means the gross  book  value of the  assets of
          Borrower  (exclusive of goodwill,  patents,  trademarks,  trade names,
          organization  expense,  treasury stock,  unamortized debt discount and
          expense,  deferred charges,  and other like intangibles and monies due
          from  affiliates,  officers,  directors,  or shareholders of Borrower)
          less  (a)  reserves  applicable  thereto,   and  (b)  all  liabilities
          (including  accrued and deferred  income  taxes),  all  determined  in
          accordance with GAAP.

          (e) Section  2.A.ii.  of  the Loan  Agreement  shall be amended by (i)
     inserting the date  "November  30, 2000" instead of the date  "November 30,
     1999" in the first sentence, and (ii) deleting the phrase "more than ninety
     days" in the proviso in the second sentence.

          (f) Section  3.F. of the Loan  Agreement  shall be amended by deleting
     the following  currencies from the second sentence thereof:  French Francs,
     Deutsche Marks,  Italian Liras,  Dutch Guilders,  Spanish Pesetas,  Belgium
     Francs, Finnish Marks, and Irish Punts.

          (g) Section 5.A.i. of the Loan Agreement shall be amended and restated
     in its entirety to read as follows:

          Maintain,  as of the end of each calendar quarter,  Tangible Net Worth
          of not less than 90% of the  greater of (a)  Tangible  Net Worth as of
          December 31, 1999 and (b) Tangible Net Worth as of September 30, 1999.

          (h) Section 5.B.i. of the Loan Agreement shall be amended and restated
     in its entirety to read as follows:

          Furnish to Bank annual consolidated  financial  statements of Borrower
          for each fiscal year of  Borrower,  certified  by Borrower as true and
          correct, within 90 days of the end of such fiscal year.

          (i) Section  5.B.ii.  of  the  Loan  Agreement  shall be  amended  and
     restated in its entirety to read as follows:

          Furnish to Bank quarterly consolidated financial statements (including
          a balance  sheet and profit and loss  statement)  of Borrower  for the
          first three fiscal quarters of each fiscal year of Borrower, certified
          by  Borrower  as true and  correct,  within 45 days of the end of each
          such fiscal quarter.

          (j) Section  5.B.iii.  of  the  Loan  Agreement  shall be  amended  by
     deleting  the word "SEC" where it first  appears  therein and  replacing it
     with "Securities and Exchange Commission (the "SEC")".

          (k) Section  5.B.iv.  of  the  Loan  Agreement  shall be  amended  and
     restated in its entirety to read as follows:

          Concurrently with the delivery of the financial statements referred to
          in Section 5.B.i. and Section 5.B.ii. above, a compliance  certificate
          for  (and  executed  by  an  authorized  representative  of)  Borrower
          containing (a) a  certification  that Borrower is not in default under
          the terms of this Agreement, and (b) computations and conclusions,  in
          such detail as Bank may request,  with respect to compliance with this
          Agreement, and the other Loan Documents, including computations of all
          quantitative covenants.

          (l) Section 6.B. of the Loan  Agreement  shall be amended and restated
     in its entirety to read as follows:

          Liens. Create, assume, or suffer to exist any security interest,  deed
          of  trust,  mortgage,  lien  (including  the  lien  of an  attachment,
          judgment,  or  execution),  or  encumbrance,   securing  a  charge  or
          obligation,  on or of any of its property,  real or personal,  whether
          now owned or hereafter acquired  (including,  without limitation,  its
          65.250  acre  tract  of  land,  more or  less,  out the  James  Rogers
          Headright   Survey  No.  19,  in  Travis  County,   Texas,   including
          improvements  thereon)  except:  (i) security  interests  and deeds of
          trust  in  favor  of  Bank;  (ii)  liens,   security  interests,   and
          encumbrances  in  existence  as of the date of the First  Amendment to
          this  Agreement  dated  as  of  December  31,  1999  and  specifically
          disclosed  in  writing to Bank  prior to such  date;  (iii)  liens for
          current taxes,  assessments,  or other governmental  charges which are
          not  delinquent or remain payable  without any penalty;  (iv) liens in
          connection  with workers'  compensation,  unemployment  insurance,  or
          other  social  security   obligations;   (v)   mechanics',   worker's,
          materialmen's,  landlords',  carriers', or other like liens arising in
          the ordinary and normal course of business with respect to obligations
          which are not due;  and (vi)  purchase  money  security  interests  in
          property hereafter acquired when the security interest does not extend
          beyond the property purchased.

<PAGE>

          (m) Section  7.D. of the Loan  Agreement  shall be amended by deleting
     the  phrase  ",  as of  the  end  of  two  (2)  consecutive  quarter-annual
     accounting periods".

          (n) Section 7.F. of the Loan  Agreement  shall be amended and restated
     in its entirety to read as follows:

          Borrower (i) fails to pay Borrower's debts generally as they come due,
          after giving effect to any  applicable  notice and cure periods in the
          relevant  documents for such debts,  (ii) makes an assignment  for the
          benefit of creditors,  becomes  insolvent,  or petitions or applies to
          any tribunal for the appointment of a trustee, custodian, receiver (or
          similar official) of, or for,  Borrower,  or of all or any substantial
          part  of  the  assets  of  Borrower,  or  (iii)  files  any  petition,
          proceeding,   case,  or  action  for  relief  under  any   bankruptcy,
          reorganization,  insolvency,  or  moratorium  law, or any other law or
          laws for the relief of, or relating to, debtors.

          (o) Section 7.G. of the Loan  Agreement  shall be amended and restated
     in its entirety to read as follows:

          An  involuntary  petition  is filed  under any  bankruptcy  or similar
          statute  against  Borrower,  or  a  receiver,   trustee,   liquidator,
          assignee,  custodian,  sequestrator,  or  other  similar  official  is
          appointed  without  the  petition or  application  of Borrower to take
          possession of the properties of Borrower; provided, however, that such
          Event of Default shall be deemed cured if such petition or appointment
          is set aside or  withdrawn  or  ceases to be in effect  within 60 days
          from the date of said filing or appointment.

          (p) Section 8.A. of the Loan Agreement shall be amended by:

               (i) deleting "7.F." where it appears in clause ii. thereof;

               (ii)adding the following as clause iii. after clause ii. thereof:

               If the Event of Default is  Borrower's  breach of clause (iii) of
          subsection  7.F.  above or of  subsection  7.G.  above (in the case of
          subsection  7.G.,  after expiration of the 60-day cure period provided
          in such subsection), then, without any notice to Borrower or any other
          party now or hereafter  obligated to pay the  Indebtedness or any part
          thereof or any other action, the maturity of the Indebtedness shall be
          automatically  accelerated  and the  Note and all  other  Indebtedness
          shall be immediately due and payable in full.; and

               (iii) amending and  restating  clause iv.  thereof to read in its
          entirety as follows:

               As to any other Event of Default (that is, a breach of subsection
          7.D., 7.E, 7.F.i.,  7.F.ii. or 7.H.), then Bank may, without notice to
          Borrower  or any other  party now or  hereafter  obligated  to pay the
          Indebtedness  or any part  thereof,  accelerate  the  maturity  of the
          Indebtedness   and  declare  the  Note  and  all  other   Indebtedness
          immediately due and payable in full.

     3. Amendments to Promissory Note. The Note shall be amended by (i) deleting
the date "December 31, 1999"  wherever it appears  therein and replacing it with
"December 29, 2000," and (ii)  deleting the date  "September  30, 1999" where it
appears therein and replacing it with "September 30, 2000."

     4. Representations  and  Warranties.  The  Borrower  hereby  represents and
warrants to the Bank as follows:

          (a) No Event of Default or event or circumstance which, with notice or
     the passage of time,  would be an Event of  Default,  has  occurred  and is
     continuing.

          (b) The  execution,  delivery and  performance by the Borrower of this
     Amendment  have been duly  authorized by all necessary  corporate and other
     action and do not and will not require any  registration  with,  consent or
     approval  of,  notice to or action by, any public  authority or other third
     party in order to be effective  and  enforceable.  The Credit  Documents as
     amended  by  this  Amendment   constitute  the  legal,  valid  and  binding
     obligations  of the Borrower,  enforceable  against it in  accordance  with
     their respective terms, without defense, counterclaim or offset.

          (c) All  representations  and warranties of the Borrower  contained in
     the Loan Agreement are true and correct on and as of the date hereof.

<PAGE>

          (d) The Borrower is entering  into this  Amendment on the basis of its
     own investigation  and for its own reasons,  without reliance upon the Bank
     or any other party.

     5. Effective Date; Post-Closing Delivery.

          (a) This  Amendment  will become  effective as of the date first above
     written,  provided  that the Bank has  received  from the  Borrower  a duly
     executed original (or, if elected by the Bank, an executed  facsimile copy)
     of this Amendment.

          (b) On or before  January 31, 2000,  the Borrower shall deliver to the
     Bank a copy of a  resolution  passed  by the  board  of  directors  of such
     corporation,  certified by the Secretary or an Assistant  Secretary of such
     corporation  as  being  in  full  force  and  effect  on the  date  hereof,
     authorizing  the execution,  delivery and  performance  of this  Amendment,
     along with a certified incumbency certificate.

     6. Reservation  of Rights.  The Borrower  acknowledges  and agrees that the
execution  and  delivery  by the Bank of this  Amendment  shall not be deemed to
create a  course  of  dealing  or  otherwise  obligate  the  Bank to enter  into
amendments under the same, similar or any other circumstances in the future.

     7. Miscellaneous.

          (a) Except as  herein  expressly  amended,  all terms,  covenants  and
     provisions  of the Credit  Documents are and shall remain in full force and
     effect and all  references  therein and in the other Loan Documents to each
     such Credit  Document  shall  henceforth  refer to such Credit  Document as
     amended by this  Amendment.  This  Amendment  shall be deemed  incorporated
     into, and a part of, the respective Credit  Documents.  This Amendment is a
     Loan Document.

          (b) This  Amendment  shall be binding upon and inure to the benefit of
     the  parties  hereto  and to the  Credit  Documents  and  their  respective
     successors  and  assigns.  No third  party  beneficiaries  are  intended in
     connection with this Amendment.

          (c) THIS  AMENDMENT  AND THE RIGHTS  AND  OBLIGATIONS  OF THE  PARTIES
     HEREUNDER SHALL BE DEEMED TO HAVE BEEN MADE IN THE STATE OF TEXAS AND SHALL
     BE GOVERNED BY AND  CONSTRUED IN  ACCORDANCE  WITH THE LAWS OF THE STATE OF
     TEXAS.

          (d) This Amendment may be executed in any number of counterparts, each
     of which shall be deemed an original,  but all such  counterparts  together
     shall  constitute  but one and the  same  instrument.  Each of the  parties
     hereto  understands  and agrees that this document (and any other  document
     required  herein) may be delivered by any party thereto  either in the form
     of  an  executed  original  or  an  executed  original  sent  by  facsimile
     transmission  to be followed  promptly by mailing of a hard copy  original,
     and  that  receipt  by  the  Bank  of  a  facsimile   transmitted  document
     purportedly  bearing the signature of the Borrower  shall bind the Borrower
     with the same force and effect as the delivery of a hard copy original. Any
     failure  by the Bank to receive  the hard copy  executed  original  of such
     document  shall not diminish the binding effect of receipt of the facsimile
     transmitted executed original of such document which hard copy page was not
     received by the Bank, and the Bank is hereby  authorized to make sufficient
     photocopies thereof to assemble complete counterparty documents.

          (e) This Amendment,  together with the Credit Documents,  contains the
     entire and exclusive  agreement of the parties hereto with reference to the
     matters discussed herein and therein.  This Amendment  supersedes all prior
     drafts and communications  with respect thereto.  This Amendment may not be
     amended except in a writing signed by the Borrower and the Bank.

          (f) If any  term  or  provision  of this  Amendment  shall  be  deemed
     prohibited by or invalid under any applicable  law, such provision shall be
     invalidated without affecting the remaining provisions of this Amendment or
     the Credit Documents, respectively.

          (g) The  Borrower  covenants  to pay to or  reimburse  the Bank,  upon
     demand,  for  all  reasonable  costs  and  expenses,  including  reasonable
     attorneys'  fees and  allocated  costs of  in-house  counsel,  incurred  in
     connection with the development,  preparation,  negotiation,  execution and
     delivery of this Amendment, not to exceed $2,500.

          (h) NOTICE OF FINAL AGREEMENT. THE WRITTEN LOAN AGREEMENT, THE WRITTEN
     NOTE, AND THE OTHER LOAN DOCUMENTS,  EACH AS AMENDED HEREBY,  REPRESENT THE
     FINAL AGREEMENT  BETWEEN THE PARTIES AND MAY NOT BE CONTRACTIED BY EVIDENCE
     OF PRIOR,  CONTEMPORANEIOUS  OR SUBSEQUENT  ORAL AGREEMENTS OF THE PARTIES.
     THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

                            [Signature page follows]

<PAGE>

      IN WITNESS  WHEREOF,  the parties  hereto have caused this Amendment to be
duly executed and delivered by their duly authorized  representatives  as of the
date first above written.

                                          NATIONAL INSTRUMENTS CORPORATION

                                          By: /s/ James J. Truchard
                                          Name: James J. Truchard
            [corporate seal]              Title: President

 Attest:  /s/ David G. Hugley
              David G. Hugley, Secretary


                                          BANK OF AMERICA, N.A.

                                          By: /s/ Brian K. Chin
                                          Name: Brian K. Chin
                                          Title: Vice President



                                                                    EXHIBIT 11.1

                NATIONAL INSTRUMENTS CORPORATION AND SUBSIDIARIES
                STATEMENTS RE: COMPUTATION OF EARNINGS PER SHARE
                      (In thousands, except per share data)





                                                  Years Ended December 31,
                                                1999       1998       1997
                                              --------   --------   --------

Net income                                    $45,248    $37,386    $33,625
                                              ========   ========   ========

Basic earnings per share                      $  0.91    $  0.76    $  0.69
                                              ========   ========   ========

Weighted average shares outstanding-basic      49,776     49,248     48,845
                                              ========   ========   ========

Diluted earnings per share                    $  0.87    $  0.73    $  0.67
                                              ========   ========   ========

Weighted average shares outstanding-diluted    52,203     51,150     50,484
                                              ========   ========   ========


Calculation of weighted average shares:

   Weighted average common stock
     outstanding-basic                         49,776     49,248     48,845
   Weighted average common stock options,
     utilizing the treasury stock method        2,427      1,902      1,639
                                              --------   --------   --------

Weighted average shares outstanding-diluted    52,203     51,150     50,484
                                              ========   ========   ========


                                                                    EXHIBIT 21.1

                           Subsidiaries of the Company

(Unless noted as a Texas  corporation,  all  subsidiaries are formed under local
law.)

DASYTEC USA, Incorporated
DATALOG Systeme zur Me(beta)werterfassung GmbH & Co. KG, Germany
GfS Systemtechnik GmbH & Co. KG, Germany
GfS Systemtechnik Verwaltungs GmbH, Germany
GfS Vermogensverwaltungs GmbH & Co. KG, Germany
GfS, Inc., a Michigan corporation
N.I. Export (Barbados) Ltd., Barbados
National Instruments Australia Corporation, a Texas corporation
National Instruments Belgium N.V., Belgium
National Instruments Beteiligungs GmbH, Germany
National Instruments Brazil, Brazil
National Instruments Canada Corporation, a Texas corporation
National Instruments (Czech Republic) s.r.o., Czech Republic
National Instruments Corporation (UK) Limited, United Kingdom
National Instruments de Mexico, S.A. de C.V., Mexico
National Instruments Europe Corporation, a Texas corporation
National Instruments Finland Oy, Finland
National Instruments France Corporation, a Texas corporation
National Instruments Germany GmbH, Germany
National Instruments Gesellschaft m.b.H., Salzburg, Austria
National Instruments Hong Kong Limited, Hong Kong
National Instruments India Corporation, a Texas corporation
National Instruments International Distribution B.V., Netherlands
National Instruments (Ireland) Limited, Ireland
National Instruments Israel Ltd., Israel
National Instruments Italy s.r.l., Italy
National Instruments Japan Kabushiki Kaisha, Japan
National Instruments (Korea) Corporation, Korea
National Instruments Netherlands B.V., Netherlands
National Instruments Netherlands Investments B.V., Netherlands
National Instruments New Zealand Limited, New Zealand
National Instruments Poland Sp.Zo.o, Poland
National Instruments Scandinavia Corporation, a Texas corporation
National Instruments Singapore (PTE) Ltd., Singapore
National Instruments Spain, S.L., Spain
National Instruments Sweden A.B., Sweden
National Instruments Switzerland Corporation, a Texas corporation
National Instruments Taiwan Corporation, a Texas corporation
NI Cayman Islands, Cayman Islands
Shanghai NI Instruments LTD, China
Travis Investments C.V., Amsterdam
Virtual Instruments SDN BHD, Malaysia
WorldSoft, Ltd., United Kingdom


                                                                    EXHIBIT 23.1

                         Consent of Independent Accounts

We  hereby  consent  to the  incorporation  by  reference  in  the  Registration
Statement on Form S-8 of National  Instruments  Corporation  of our report dated
January  18,  2000  relating  to the  financial  statements  and  the  financial
statement schedule, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Austin, Texas
March 20, 2000


<TABLE> <S> <C>

<ARTICLE>                                           5
<LEGEND>
     (Replace this text with legend, if applicable)
</LEGEND>
<MULTIPLIER>                                                     1000
<CURRENCY>                                          U.S. Dollar

<S>                                                   <C>
<PERIOD-TYPE>                                       Year
<FISCAL-YEAR-END>                                   Dec-31-1999
<PERIOD-START>                                      Jan-01-1999
<PERIOD-END>                                        Dec-31-1999
<EXCHANGE-RATE>                                                     1
<CASH>                                                         45,309
<SECURITIES>                                                   83,525
<RECEIVABLES>                                                  62,422
<ALLOWANCES>                                                    4,143
<INVENTORY>                                                    26,161
<CURRENT-ASSETS>                                              231,029
<PP&E>                                                        117,614
<DEPRECIATION>                                                 47,843
<TOTAL-ASSETS>                                                318,753
<CURRENT-LIABILITIES>                                          57,268
<BONDS>                                                             0
                                               0
                                                         0
<COMMON>                                                          500
<OTHER-SE>                                                    253,735
<TOTAL-LIABILITY-AND-EQUITY>                                  318,753
<SALES>                                                       329,583
<TOTAL-REVENUES>                                              329,583
<CGS>                                                          76,040
<TOTAL-COSTS>                                                  76,040
<OTHER-EXPENSES>                                              190,675
<LOSS-PROVISION>                                                    0
<INTEREST-EXPENSE>                                                404
<INCOME-PRETAX>                                                67,353
<INCOME-TAX>                                                   21,553
<INCOME-CONTINUING>                                            45,800
<DISCONTINUED>                                                      0
<EXTRAORDINARY>                                                     0
<CHANGES>                                                        (552)
<NET-INCOME>                                                   45,248
<EPS-BASIC>                                                    0.91
<EPS-DILUTED>                                                    0.87



</TABLE>


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