BIO LOGIC SYSTEMS CORP
10KSB, 1998-05-29
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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                      SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C. 20549

                                  FORM 10-KSB

|X|  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934

For the fiscal year ended February 28, 1998

                                      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 No. 0-12240

                           BIO-LOGIC SYSTEMS, CORP.
                 --------------------------------------------
                (Name of Small Business Issuer in its charter)


        DELAWARE                                             36-3025678
- -------------------------------                          -------------------
(State or other jurisdiction of                           (I.R.S. Employer
incorporation or organization)                           Identification No.)


ONE BIO-LOGIC PLAZA, MUNDELEIN, ILLINOIS                     60060-3700
- ----------------------------------------                     ----------
(Address of principal executive offices)                     (Zip Code)

Issuer's telephone number, including area code: (847) 949-5200
                                                --------------

              Securities registered under Section 12(b) of the Act:

                                                        Name of each exchange
   Title of Each class                                   on which registered
  --------------------                                  ----------------------
          None                                                  None

              Securities registered under Section 12(g) of the Act:

                         COMMON STOCK, $.01 PAR VALUE
                         ----------------------------
                               (Title of Class)

      Check whether the issuer (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
                           -----                   -----

      Check here if there is no disclosure of delinquent filers pursuant to Item
405 of Regulation S-B contained herein, and will not be contained, to the best
of the registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-KSB or any amendment to
this Form 10-KSB. |X|

      State the issuer's revenues for its most recent fiscal year:
$18,018,689.

      As of May 22, 1998 the issuer had 4,011,984 shares of Common Stock
outstanding. The aggregate market value of the Common Stock held by
nonaffiliates as of May 22, 1998 was approximately $15.4 million.

================================================================================

<PAGE>


                      DOCUMENTS INCORPORATED BY REFERENCE

                                   Part III

Item 9.                 Directors,
                        Executive Officers,           To be included in the
                        Promoters and Control         Proxy Statement to be
                        Persons; Compliance with      filed pursuant to
                        Section 16(a) of the          Regulation 14A not
                        Exchange Act                  later than 120 days
                                                      after the end of the
Item 10.                Executive Compensation        Registrant's fiscal year.

Item 11.                Security Ownership
                        of Certain Beneficial
                        Owners and Management

Item 12.                Certain Relationships
                        and Related Transactions

                                    PART I

Item 1.  Business

      (a)   General Development of Business

            Bio-logic(R) Systems Corp. ("Bio-logic" or the "Company") designs,
develops, assembles and markets computer-based electro-diagnostic systems for
use by hospitals, clinics, universities and physicians. The principal
electro-diagnostic procedures performed by the Company's systems include digital
electroencephalography, for routine and long-term monitoring, evoked response
testing, otoacoustic emissions testing, computerized electromyography,
polysomnography, topographic brain mapping, and other quantitative EEG analyses.
These tests are typically used by medical practitioners specializing in fields
such as neurology, otolaryngology, audiology, anesthesiology, pulmonology, and
psychiatry to aid in diagnosis of certain neurological, sensory, and psychiatric
disorders, and to monitor brain function in the intensive care unit and
operating theater.


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<PAGE>


            The Company was incorporated under the laws of the State of Delaware
in August 1981 as a successor to an Illinois corporation formed in March 1979.
All references herein to the Company include, unless otherwise indicated, the
operations of the Company and its wholly-owned subsidiaries. On July 1, 1994,
the Company acquired certain assets and assumed certain liabilities of Neuro
Diagnostics, Inc. ("NDI"), a wholly-owned subsidiary of Luther Medical Products,
Inc. NDI, now a wholly-owned subsidiary of the Company, develops, manufactures
and distributes high technology human nervous system testing equipment for use
by hospitals, clinics and physicians. The Company's executive offices are
located at One Bio-logic Plaza, Mundelein, Illinois 60060-3700.

      (b)   Financial Information About Industry Segments

            The Company operates in one business segment: the design,
development, assembly and marketing of computerized medical electro-diagnostic
systems for use in the health care field.

      (c)   Narrative Description of Business

            Bio-logic designs, develops, assembles and markets computer-based
electro-diagnostic systems for use by hospitals, clinics, universities and
physicians. The principal electro-diagnostic procedures performed by the
Company's systems include computerized electroencephalography, for routine and
long-term monitoring, topographic brain mapping, evoked response testing,
otoacoustic emissions testing, sleep analysis and computerized electromyography.
These tests are typically used by medical practitioners specializing in fields
such as neurology, psychiatry, audiology, otolaryngology, anesthesiology and
psychology to aid in diagnosis of certain neurological, psychiatric and sensory
disorders, psychological and learning disorders, brain disorders and tumors.

            Bio-logic's systems are in modular form and consist of IBM1* PC
compatible microcomputers purchased from third parties, interfaced with software
and peripheral devices developed and manufactured by the Company. Any
combination of available diagnostic tests can be included in a system depending
on the user's specialty and requirements. The Company has developed software
which enables medical personnel to administer diagnostic tests, to control
various aspects of the testing and to record and process data generated by the
tests. Operation of any of the Company's systems does not require programming
skills on the part of the customer. The Company believes that its systems allow
users to test patients on a cost efficient basis and that cost effectiveness and
ease of operation are important competitive advantages of its systems.

- -----------------
* A trademark of International Business Machines Corp.


                                       4

<PAGE>

            The Company's systems perform tests by means of computer programs
which are controlled by flexible software. The monitor screen displays a menu of
instructions prompting the operator to input information, test parameters or
specific hardware setting adjustments. Testing can be interrupted, continued or
aborted at any time. The Company's systems can be expanded beyond the main
system to include remote monitors or "data analysis stations." Data can be
collected on the main system and analyzed on data analysis stations placed in
convenient locations. Because the Company's system is compatible with the IBM
PC, the user's IBM compatible computer can be converted into a data analysis
station for a Bio-logic system, and a variety of commercially available
programs, such as word processing and database management, can be used.

            Bio-logic is incorporating remote communications capabilities in its
product lines through both modem communications and computer networks. These new
information capabilities provide (a) the ability to view in real time tests
being conducted on a remote system, which is particularly useful for
consultation during monitoring in the operating room in connection with tests
performed at alternate sites outside the hospital; (b) electronic transfer of
test results, reports and patient information among different systems; (c)
review and analysis of records stored in a remote location; and (d) sharing of
archiving media (such as optical disks) and printing devices among several
systems. These enhancements are designed to increase the efficiency and
productivity of operations and minimize duplication of equipment by customers of
the Company's systems.

            The Company's systems are sold to hospitals, universities and
private clinics and physicians to test and monitor patients as well as conduct
research. Bio-logic has a continuing program to develop new applications of
electro-diagnostic testing.

Computerized Electroencephalograph (EEG)

            The Company's Ceegraph(TM) line of computerized EEG systems records,
displays, stores, and analyzes the spontaneous brain electrical activity from
various locations on a patient's scalp. Traditional EEG machines provide only
paper tracings of EEG recordings. The Ceegraph offers the user the option of
storing the information in digital form for later display on a color monitor.
This allows the user added flexibility in display and analysis capabilities.
Furthermore, digital analysis allows increased sensitivity to subtle functional
abnormalities that may not be perceived in paper tracings of the raw data. The
Ceegraph minimizes the need for hard copies of all recorded data thereby
significantly reducing paper supply and storage expenses.

            The Ceegraph line includes a series of several products ranging from
a hardware and software kit, which the customer can add to his own
IBM-compatible computer to create a digital EEG system, to a portable EEG system
and/or an advanced stationary system with multiple capabilities for EEG,
quantitative EEG analysis, and other neurological applications. The Ceegraph
line also includes a Ceegraph Reader(TM) which permits fast and easy review in a


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<PAGE>


graphic display. The Ceegraph line is priced from approximately $25,000 to
$60,000 depending upon the model.

            A video option allows videotape recording of a patient during EEG
acquisition. Computerized control of the VCR provides synchronous recording of
EEG and video for long-term epilepsy monitoring and other applications.

            SmartPack(TM), a patented software option available with the
Ceegraph line, is an innovative data compression process that saves about 60% in
storage and archiving space. Data compression is performed in real-time with no
loss of information.

            The Ceegraph Traveler(R) is a solid-state battery-operated
ambulatory recorder for epilepsy monitoring that records continuous information
from 24 channels and saves data on a removable PCMCIA hard disk. Data can
immediately be reviewed and analyzed by the Ceegraph analysis program and
subjected to automatic spike and seizure analysis.

            SmartTrack(TM) is another Ceegraph software option used for
automatic analysis of epileptic spikes and seizures. This system was developed
through a collaboration between the Company and Johns Hopkins Epilepsy Center
and is used to assist in the identification of clinical EEG events indicative of
epilepsy. The detection algorithm is based on a neural-network approach and can
be used in real time or off line. The same system is used to analyze long-term
records obtained in the hospital and ambulatory recordings performed with the
Ceegraph Traveler off site.

Quantitative EEG

            The Company offers a series of products for advanced analysis of EEG
and evoked potentials, including (i) topographic brain mapping, which is used,
among other things, to evaluate the effects of drug treatments, psychiatric and
other behavioral disorders and field distribution of epileptic spikes and
seizures, (ii) dipole source localization, which is used in modeling and
characterizing the intracranial source of brain electrical activity and as an
aid in noninvasive evaluation of epilepsy, and (iii) compressed spectral array,
a quantitative analysis of EEG spectra, which is used in intensive care and
operating room monitoring. These products are priced from approximately $25,000
to $60,000 depending upon the model.


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Distortion Product Otoacoustic Emissions Testing

            Distortion Product Otoacoustic Emissions (DPOAE) testing is a
non-invasive, objective technique for evaluating the function of the cochlea,
the sensory organ of the auditory system. The system introduces two pure tones
of known intensity and frequency parameters into the patient's ear canal and
measures the small amplitude acoustic response generated by the outer hair cells
in response to the signal. The measurement of an emission greater in amplitude
than the level of the ambient acoustic noise suggests functional cochlear
structures. The Company offers a series of products for DPOAE measurements,
which are used in clinical practice to diagnose hearing/auditory impairments.
They can also be used in hospital neonatal intensive care units or well-baby
nurseries as a peripheral hearing screening tool.

            In April 1997, the Company introduced its recently developed AuDX
system, which is designed to routinely test the hearing of toddlers and
school-age children who currently are not routinely screened for audiological
problems. AuDX is a battery-operated, hand-held device designed to detect
hearing impairment which is being marketed by the Company to pediatricians,
family practitioners and schools. The selling price of the DPOAE and AuDX
systems range from $5,000 to $15,000.

Evoked Response Testing

            Evoked response testing is an accepted, non-invasive and objective
technique for evaluating the peripheral and central nervous systems. An evoked
response test measures the reaction to a stimulus by monitoring the electrical
activity in the patient's brain. By comparing the magnitude and timing of the
response in a particular patient to normal patterns of response, a physician is
aided in his evaluation of the patient's neurological pathways.

            Evoked response testing facilitates the diagnosis of a number of
disorders. Evoked response testing provides information that can be used in the
investigation of neurological and sensory disorders, brain tumors, and damage to
the brainstem. The Company provides modular systems which can perform auditory,
visual and somatosensory evoked response tests. The auditory evoked response
testing evaluates the function and disorders of the central and peripheral
auditory system. Visual testing is used to diagnose disorders of the visual
system and somatosensory testing is used to test various segments of the central
nervous system.

            The evoked response tests performed by the Company's systems may be
used to test hearing and sight of patients who are unable to communicate
effectively, such as infants and mentally impaired individuals. Evoked response
testing may also be utilized in intensive care units as a method of confirming
brain death and in intraoperative monitoring. Surgical procedures of the back,
head, neck and other areas involving the central nervous system can be monitored
to reduce risks to the patient and improve outcomes. In addition,
pharmacologists are using these measurements to study the interaction of drugs
and their effects on living organisms, and researchers have used the test data
to study the effects of pollution and chemicals on the


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human body. The approximate selling price of the evoked response systems, which
consist of the Company's Explorer(TM), EP Navigator(R) and Traveler, range from
$15,000 to $70,000 depending upon the number and types of tests included.

Intraoperative Monitoring

            The Company's Explorer(TM) is used to reduce the risk of iatrogenic
injury to the brain, spinal cord, peripheral and cranial nerves during surgery.
Intraoperative monitoring (IOM) employs many specialized neurodiagnostic tests
including: auditory, somatosensory, and visual EP's; neurogenic and myogenic
motor EP's; EMG; EEG and quantitative EEG. Many recent improvements have been
made to the product to further increase utility in the operating room
environment and to reduce the workload of personnel performing monitoring. The
approximate selling price of the Explorer(TM) intraoperative monitoring systems
range from $30,000 to $70,000 depending upon the requested configuration.

Computerized Polysomnography

            Sleepscan(TM) is a computerized system for sleep scoring and
respiratory analysis. The analysis of sleep and respiratory patterns has proven
useful in the diagnosis and treatment of sleep related diseases, some of them
life threatening, such as apnea, insomnia, and narcolepsy. Other specialities
analyze sleep patterns to study mental disorders like depression, sexual
dysfunction, and more.

            A routine sleep study entails whole-night recordings of brain
electrical activity, muscle movement, air flow, respiratory effort, oxygen
levels and EKG. These recordings result in over 1,000 pages of paper traces
which have to be reviewed, analyzed, scored by a specialist, and summarized in a
report. This process is costly and time consuming.

            Sleepscan stores all the information digitally on magnetic and optic
media. A high resolution fast display offers an alternative to costly and bulky
paper. This flexible system enables the user to specify rules to be used during
analysis. This analysis can rapidly be performed by the computer, and the
results are summarized graphically and incorporated in a detailed report which
is readily available. The user has the ability to verify the analysis, manually
override sections as needed, modify parameters and reanalyze data. Sleepscan
offers savings in time and the cost of paper and paper storage. Sleepscan is
interfaced with a Ceegraph EEG System, and is priced from approximately $25,000
to $60,000 depending on the model.

            In addition to its computerized sleep diagnostic product line, the
Company has added a new device to our supply catalog known as the Airflow
Pressure Transducer. This device is an alternative to the currently used airflow
monitoring devices, which use temperature to produce a signal. The Airflow
Pressure Transducer will allow the user to detect airflow by


                                       8

<PAGE>


way of pressure changes. This method is documented to produce the signature
waveform used in identifying a respiratory disorder known as Upper Airway
Resistance Syndrome.

            The Company also offers a portable Sleepscan Express system with
32-channel recording capability and built-in oximeter. Whereas other portable
sleep analysis systems provide only summary analysis and fewer channels, the
Sleepscan Express is the first truly portable sleep system with full data
disclosure of up to 32 channels. Records can be analyzed on other desktop
Sleepscan systems.

            Sleepscan Traveler, introduced in spring of 1997, is a solid-state,
battery operated ambulatory recorder for sleep and epilepsy monitoring. It
records continuous information on 8, 19, or 27 channels. The data, which is
saved on a PCMCIA removable miniature hard disk for easy access, can be
immediately reviewed and analyzed by the Extended Analysis Sleep Program and the
Computer-Assisted Arousal and Sleep Staging Program, software programs available
with the Sleepscan Traveler.

Computerized Electromyography

            The Company's Explorer(TM) is used in the field of electromyography
(EMG). EMG systems are typically used by neurologists to aid in the assessment
of neuromuscular function. The Explorer allows digital processing, display and
storage of neuromuscular information, together with real-time display of
muscular activity, which previously had been available only through the
utilization of traditional analog displays. The Explorer complements the
Company's product line in that it is intended to meet the electro-diagnostic
needs of neurologists and other clinicians. In addition, NDI's products are used
in electrodiagnostic studies that include electromyography and evoked potential
testing. These tests are typically performed by neurologists, physiatrists, and
electrodiagnostic technicians to diagnose nerve and muscle disorders.

Brain Mapping

            The Company offers a series of Brain Atlas(R) systems, which vary
depending on features and capabilities. Brain Atlas detects, and presents a
series of topographical maps which actively display in color on the computer
screen, the on-going electrical activity of the brain. The different colors and
shades indicate the magnitude of positive or negative electroencephalograph
(EEG) voltages simultaneously measured at various scalp locations. The Brain
Atlas has the capability of providing an on-line, simultaneous display of
voltage-time plots and topographic maps. The maps displayed can be paused, moved
forward or reversed one frame at a time when the clinician wants to pinpoint an
exact time period for detailed analysis. The data acquired can be printed out
immediately on a multi-color printer for a permanent patient record or stored on
disk for future evaluation and printing.


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Product Development

            Bio-logic's development activities consist primarily of developing
new products and adding new features to and enhancing the capabilities of the
existing products. Refinements to the Company's systems are also developed in
response to users' suggestions. During fiscal 1998 and 1997, Bio-logic expended
$2,416,774, and $1,873,716, respectively, for research and development.

            The Company's research and product development activities include
further development of the Bio-logic Ceegraph, a computerized EEG system which
contains high-definition resolution graphics; Ceegraph Express, a portable EEG
system; Sleepscan, a system for computerized polysomnography; Sleepscan Express,
a portable system with full data disclosure; and the Explorer, an EMG system for
measuring muscle activity. The Company has and is continuing to develop
Distortion Product Otoacoustic Emission (DPOAE) equipment for the audiology
market, an 8-channel EMG/EP system for intraoperative monitoring, a
polysomnography system with ultra-high color resolution and long-term monitoring
for the sleep market. The Company has also developed an EEG system with
long-term video monitoring and spike/seizure detection for the epilepsy
monitoring market and a hardware improvement to the portable Scout(TM) Sport,
one of the Company's DPOAE products, which may result in new markets for
audiologic screening.

            One of the Company's recent market introductions is the Ceegraph
Traveler, a battery-operated ambulatory recorder for EEG and/or Sleep
monitoring. The Ceegraph Traveler is offered in a 16-channel or a 24-channel
configuration, with disposable or rechargeable batteries. The Traveler features
full disclosure of data saved on high-capacity PCMCIA removable miniature hard
disks. The records obtained off site are analyzed by the same powerful Ceegraph
program used in evaluating patients tested in the laboratory, including an
expert system for spike and seizure analysis.

            The latest development is the expansion of Ceegraph capabilities to
meet the needs of the intensive Epilepsy Monitoring market. This includes the
development of a new amplifier headbox and supporting software than can record
up to 128 channels of EEG from surface and depth electrodes. The new design
incorporates a network interface between the amplifiers and the main processor
to provide utmost flexibility in placing the monitoring system at any distance
from the patient, without compromising signal integrity.

            The Company is in the midst of porting all products to the
Windows/95 and Windows/NT operating systems. This transition is concurrent with
continuous improvements of existing products. The migration to the new operating
system is designed to give existing customers an upgrade path and maximize the
use and life of their existing systems.


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            Throughout fiscal 1998, the Company has been involved in a team
effort to achieve certification to ISO 9001 and EN46001. These standards are
designed to define and strengthen a company's quality system to improve quality
and increase efficiency. Additional compliance with the European Medical Device
Directive will allow Bio-logic to place the CE mark on its' products, as
required after June 14, 1998, for sale of products to the European market. TUV
Rheinland has been contracted as the Company's Notified Body and Registrar. A
certification audit is expected to take place in the beginning of July 1998.

            The Company anticipates that it will continue to incur significant
research and development expenditures in connection with the introduction of new
products and new models and upgrades of existing products. Additionally, from
time to time the Company may seek to license or acquire complementary
technologies from third parties.

            The Company is a party to a number of other research and development
agreements under which, as of February 28, 1998, the Company had received an
aggregate of approximately $1,087,000. The Company is required to pay royalties
based on sales of any product developed under such agreements, or in the event
of licensing of such products to a third party. The total payments by the
Company, including royalties and licensing fees, will not exceed 150% of the
amounts received under such agreements. As of February 28, 1998, the Company has
paid royalties of $1,061,281 under such agreements.

Sales and Marketing

            The Company's marketing efforts are directed at medical
practitioners, hospitals and clinics. Sales are presently conducted by sales
representatives and independent dealer organizations covering the United States
and Canada. Some of these distributors may also represent other companies
offering products competitive with those of the Company. The Company's marketing
efforts are directed and controlled from its corporate headquarters in the
Chicago area. The Company has an overseas office to cover European and Middle
Eastern markets and has arrangements with foreign distributors to sell the
Company's products overseas, including the Far East and Latin America. No one
customer or distributor has accounted for over 10% of the Company's revenues.

            To demonstrate, promote and market its systems, Bio-logic attends
seminars and trade shows organized by others and sponsors its own educational
and sales oriented seminars throughout the United States. Selling and marketing
programs include operations of the European sales office and sales and other
product brochures and direct mail programs.


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Foreign Sales

            During fiscal 1998, export sales increased to $3,924,059, or
approximately 22% of net sales, compared to $3,605,475, or approximately 24% of
net sales, in fiscal 1997. See "Management's Discussion and Analysis of
Financial Condition and Results of Operations." The Company is required to
obtain export licenses for sales of some of its systems to foreign countries.
Political and governmental conditions, import and export restrictions, and
currency fluctuations may adversely affect the Company's foreign business.

Customer Training, Support and Maintenance

            In connection with the installation of a system, the independent
dealer's sales representative or, if the sale was made directly by the Company,
the Company's customer support personnel, train medical and office personnel in
the use of the equipment, assist in the introduction of the data into the system
and provide assistance to the customer during the initial period of operations.
The Company continues to support its technical and customer training staff.
Foreign sales are supported by the foreign distributors. The Company's practice
is to offer without additional charge a one year limited warranty on its
software and equipment for parts and labor. The Company has experienced
satisfactory field operating results and warranty expense has been insignificant
to date. The manufacturers of the microcomputer included in the Company's
systems provide a one year warranty against defects and have service
capabilities throughout the United States. In addition, the Company offers its
customers service and maintenance agreements for an additional fee. Service fees
have been insignificant to date. Software enhancements developed by the Company
are typically distributed to system users for a minimal fee.

Assembly, System Hardware and Sources of Supply

            The Company assembles its systems by integrating microcomputers,
monitors and printers and certain standard components manufactured by other
manufacturers, with peripherals and other hardware including circuit boards and
certain electronic components manufactured by Bio-logic and software packages
which it has developed. The Company's systems are composed of IBM PC compatible
microcomputers, appropriate printers and mass storage media such as Winchester
hard disks, floppy diskettes and optical or laser disks for the storage of both
operating programs and data. The Company purchases microcomputers from
distributors of such products for varying discounts depending upon the volume of
equipment purchased. The components used in the Company's systems are available
from a number of suppliers.

            The microcomputer is non-dedicated and therefore adaptable for a
wide variety of applications. Making a program change or adding a new capability
usually requires only the interchanging of floppy diskettes.


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            The Company performs quality control and testing procedures on all
systems prior to delivery.

Patents and Trademarks

            The Company currently owns six patents covering certain aspects of
its brain mapping system and other technology developed by the Company,
including a patent issued in February 1997 relating to the SmartPack. There is
no assurance that such patents will afford any commercial benefits. The Company
has registered the trademarks Bio-logic, Brain Atlas, Navigator and Traveler.
The Company has developed a number of unpublished computer software programs
which are entitled to unpublished copyright privileges as confidential
proprietary material. The Company believes that rapidly changing technology
makes its continued success dependent primarily upon the technical competence
and creative skill of its personnel rather than on patents, copyrights or other
proprietary rights.

Competition

            The Company competes with a number of entities, several of which
have greater resources than the Company, which offer systems performing
diagnostic tests similar to those performed by the Company's systems. The
Company's principal competitors, some of which are substantially larger and have
more marketing personnel and greater technical resources than the Company, are
Nicolet Instrument Corporation, NCI, Inc., Nihon-Koden Corporation, Oxford
Instruments, and Cadwell Laboratories, Inc. Bio-logic believes that it competes
for customers on the basis of the range and quality of software and hardware
offered, and the cost effectiveness of its integrated system. Another major
competitive factor is its ability to tailor systems to a customer's particular
diagnostic and data processing requirements.

Government Regulation

            The Company's products, to the extent they are deemed medical
devices, are subject to government regulation by the United States Food and Drug
Administration ("FDA") and accordingly, unless determined to be exempt, are
subject to the preclearance procedures of the FDA before reaching the market.

            Under FDA regulations, a medical device is classified as either a
Class I device, which is subject only to general control provisions, a Class II
device which, in addition to applicable general controls, will be made subject
to future performance standards developed by the FDA, or a Class III device
which, in addition to applicable general controls, is subject to FDA premarket
approval.

            The Company's systems have been classified as Class II medical
devices as such term is defined in the regulations promulgated by the FDA. The
Company has filed 510(K)


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applications (notifications of intention to market) with the FDA. The Company
continues to advise the FDA as modifications and additions are made to its
systems.

            In addition, all manufacturers of medical devices are required to
register with the FDA and to adhere to certain "good manufacturing practices"
and "good laboratory practices," which prescribe recordkeeping procedures and
provide for the unscheduled inspection of facilities.

Employees

            As of February 28, 1998, the Company employed 94 persons full time.
The Company's business is dependent in part upon its ability to recruit and
retain qualified personnel. None of its employees are represented by a labor
union and the Company believes its employee relations are satisfactory.

Executive Officers

      The executive officers of the Company are as follows:

            Name                    Age         Position
            -----                   ----        ---------
            Gabriel Raviv, Ph.D.    47          President, Chief
                                                Executive Officer,
                                                Director

            Thomas S. Lacy          55          Vice
                                                President-Marketing
                                                and Sales

            Gabriel Raviv has been a Director of the Company since the
Company commenced operations in March 1979.  He was Vice President of the
Company from March 1979 until February 1981, when he became President and
Chief Executive Officer.  He is a member of the Board of Trustees of the
Mid-West Bio-Laser Institute and an Adjunct Professor at Northwestern
University.  From October 1975 until January 1981, Dr. Raviv was the director
of the Clinical Research Instrumentation Laboratory at Evanston Hospital (an
affiliate of Northwestern University).  Dr. Raviv received his M.S. and Ph.D.
degrees in Electrical Engineering and Computer Sciences from Northwestern
University.

            Thomas Lacy has been Vice President-Marketing and Sales of the
Company since January 1994. Prior thereto he was Vice President-International of
Packard Instrument Corporation from July 1992 until July 1993 and Vice
President-General Manager of Packard Instrument Company from September 1988
until July 1992.


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<PAGE>


Item 2.  Properties

            The Company's headquarters and manufacturing operations are located
in an approximately 26,000 square foot facility built by the Company on
approximately 20 acres in Mundelein, Illinois. The building and property are
owned by the Company, subject to Industrial Development Bond financing in the
original principal amount of $1,600,000. As collateral for the Bond, the Company
granted the municipality a mortgage on the property.

            The Company also leases two offices overseas, both of which are
occupied pursuant to a lease providing for an annual rental of approximately
$15,300 and $35,500, respectively, subject to annual increases.

Item 3.  Legal Proceedings

            The Company is not a party to any material legal proceedings.

Item 4.  Submission of Matters to a Vote of Security Holders

            Not Applicable.


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<PAGE>


                                    PART II

Item 5.     Market for Registrant's Common Equity and Related Stockholder
            Matters

      (a)   Price Range of Securities

            The Company's Common Stock is listed on the Nasdaq National Market
under the symbol BLSC. The Company's Warrants are listed in the "pink sheets"
but have not been priced since December 1990. The following tables set forth the
high and low sales prices of the Common Stock for the periods indicated as
reported by Nasdaq. These quotations represent prices between dealers in
securities, do not include retail mark-ups, mark-downs or commissions and do not
necessarily represent actual transactions. These quotations are rounded to the
nearest 1/16 through the 3rd quarter 1998 and to the 1/25 beginning in the 4th
quarter 1998:

                                        High            Low
                                     Sales Price    Sales Price
                                     -----------    -----------

FISCAL YEAR ENDED FEBRUARY 28, 1998

                 1st Quarter          $ 3 7/8        $2 7/8
                 2nd Quarter            6 5/8         2 7/8
                 3rd Quarter            9 3/4         4 5/8
                 4th Quarter          5 18/25         3 7/8

FISCAL YEAR ENDED FEBRUARY 28, 1997

                 1st Quarter          $ 4 1/2        $3 1/8
                 2nd Quarter            3 7/8         2 1/2
                 3rd Quarter            3 1/8         2 3/8
                 4th Quarter            3 1/2         2 3/8


      (b)   Approximate Number of Equity Security Holders

            As of May 22, 1998 there were approximately 258 record holders of
the Company's Common Stock. The Company believes that there are in excess of 400
beneficial owners of its Common Stock.


                                       16

<PAGE>


      (c)   Dividends

            The Company has never paid a cash dividend on its Common Stock and
intends to continue to follow a policy of retaining earnings to finance future
growth. Accordingly, the Company does not anticipate the payment of cash
dividends to holders of Common Stock in the foreseeable future. Under an
agreement with the bank which purchased the Industrial Development Bond issued
to finance construction of the Company's headquarters, the Company may not pay
cash dividends during the term of the Bond without the prior written consent of
the bank.

Item 6.     Selected Financial Data

            The selected financial data presented below summarizes certain
financial data and should be read in conjunction with the more detailed
financial statements of the Company and the notes thereto included elsewhere in
this Annual Report on Form 10-KSB along with said financial statements.


                              Fiscal Year Ended Last Day of February,
                    ----------------------------------------------------------
                          1998        1997        1996        1995        1994
                          ----        ----        ----        ----        ----

Net sales          $18,018,689  $14,856,955 $14,602,000  $12,072,674 $10,749,332

Operating income     1,551,114      811,712   1,204,459      787,150     403,994

Net income (1)       1,148,436      683,845     892,091      740,412     539,755

Net income per
 share (2)(3)             0.28         0.17        0.21         0.18        0.13

Working capital     10,236,421    7,645,040   9,428,915    6,925,542   8,204,175

Total assets        15,801,237   13,924,402  14,379,986   13,499,684  12,323,224

Long-term debt         427,174      562,879     689,877      808,726     919,950

Total liabilities    3,366,444    2,725,000   2,982,675    3,130,431   2,740,415

Shareholders'
 equity            $12,434,793  $11,199,402 $11,397,311  $10,369,253  $9,948,140

Shares
 outstanding (2)(3)  4,117,334    4,140,216   4,329,445    4,220,040   4,295,937

- ----------

(1)  Includes net interest income of $173,505, $170,864, $114,412, $137,972 and
     $185,855 in fiscal 1998, 1997, 1996, 1995 and 1994, respectively.


                                       17

<PAGE>


 (2) Weighted average number of common and dilutive common equivalent shares
     calculated using average market prices.

 (3) On February 28, 1998, The Company adopted Statement of Financial
     Accounting Standards No. 128 - "Earnings per Share" (SFAS 128.) All current
     and prior years earnings per share data have been restated to conform to
     the provisions of SFAS 128.

Item 7.     Managements' Discussion and Analysis of Financial Condition and
            Results of Operations

            Prospective investors are cautioned that the statements in this
Annual Report on Form 10-KSB that are not descriptions of historical facts may
be forward-looking statements within the meaning of the Private Securities
Reform Act of 1995, including statements concerning the Company's future
products, results of operations and prospects. These forward-looking statements
are subject to risks and uncertainties. Actual results could differ materially
from those currently anticipated, including those relating to general economic
and business conditions, the results of research and development efforts,
technological changes and competition, potential changes in regulation by the
FDA, costs relating to manufacturing of products and the timing of customer
orders detailed elsewhere in this Annual Report on Form 10-KSB and from time to
time in the Company's filings with the Securities and Exchange Commission.

Results of Operations

            Fiscal 1998 Compared To Fiscal 1997

            Net sales for fiscal 1998 were $18,018,689, a 21% increase from net
sales of $14,856,955 during fiscal 1997. Domestic sales in fiscal 1998 increased
by 25% to $14,094,630 from $11,251,480 in fiscal 1997. Foreign sales in fiscal
1998 increased by 9% to $3,924,059 compared to $3,605,475 for fiscal 1997. As a
percentage of net sales, domestic and foreign sales for fiscal 1998 were 78% and
22%, respectively, compared to 76% and 24% for fiscal 1997, respectively. The
increase in net sales reflects higher system sales of the Ceegraph, Explorer,
Sleep and Traveler product lines, plus the sales introduction of the AuDX
systems, partially offset by lower net sales in the EP Navigator product line.

            Cost of equipment sold increased to $5,703,652 during fiscal 1998
compared to $5,140,195 for fiscal 1997, and as a percentage of net sales,
decreased to 32% for fiscal 1998 compared to 35% during fiscal 1997. This
decrease in cost of equipment sold as a percentage of net sales reflects
increased sales of higher margin products.

            Selling, general and administrative expenses increased by
approximately 19% to $8,347,149 during fiscal 1998 compared to $7,031,332 for
fiscal 1997, and as a percentage of net sales declined to 46% for fiscal 1998
compared to 47% for fiscal 1997. Selling, general and administrative expenses
for fiscal 1998 were higher primarily due to increased marketing costs
associated with the AuDX product line plus higher sales expenses in conjunction
with higher net sales.


                                       18

<PAGE>


            Research and development expenses increased by approximately 29% to
$2,416,774 during fiscal 1998 in contrast to $1,873,716 for fiscal 1997, and as
a percentage of net sales, remained at approximately 13% for both fiscal 1998
and 1997. The increase in research and development costs were mainly due to
higher individual salaries, increases in outside consulting, plus activities
relating to the capitalization of certain research and development costs aligned
with specific identifiable future products. The capitalization of these future
products amounted to $0 and $144,402 during fiscal 1998 and 1997, respectively.
Finally, the amortization expense of these capitalized research and development
costs increased to $182,985 in fiscal 1998 compared to $90,503 in fiscal 1997.

            For fiscal 1998, the Company had operating income of $1,551,114
compared to operating income of $811,712 for fiscal 1997. The increase in
operating income for fiscal 1998 was due to both higher net sales and lower cost
of sales offset by higher selling, general and administrative costs plus higher
research and development expenses.

            The Company had net interest income of $173,505 for fiscal 1998
compared to $170,864 for fiscal 1997. The increase of net interest income is
primarily due to higher interest income earned on marketable securities and
lower interest expense on short and long term debt.

            The provision for income taxes during fiscal 1998 was approximately
33% of income before taxes, compared to 30% of income before taxes in fiscal
1997. The tax provision as a percentage of net income in fiscal 1998 was higher
due to differences in foreign income and its' corresponding tax rates.

            The Company had net income of $1,148,436 or $.28 per diluted share
for fiscal 1998 compared to $683,845 or $.17 per diluted share for fiscal 1997.
The increase in net income was the result of higher gross profit partially
offset by higher operating expenses and provisions for income taxes.

Liquidity And Capital Resources

            As of February 28, 1998, the Company had working capital of
$10,236,421; including $5,124,467 of cash, cash equivalents and short-term
investments and $4,023,324 of accounts receivable. The principal sources of
working capital are funds generated from operations. Net cash provided by
operating activities during fiscal 1998 was $1,592,906. The Company believes its
capital and liquidity requirements for the foreseeable future will be satisfied
by available and internally generated funds. To the extent the Company's capital
and liquidity requirements are not satisfied internally, the Company may utilize
a $1,000,000 unsecured bank line of credit, all of which is currently available.
Borrowings under this line of credit will bear interest at the bank's prime
rate.

            Bio-logic's headquarters and manufacturing facility were partially
financed with an Industrial Development Bond (the "Bond") in the original
principal amount of $1,600,000. Principal and interest on the Bond are payable
in monthly installments through December 1, 2001. The Bond bears interest at 80%
of the base lending rate in effect from time to time. As collateral for the Bond
indebtedness, the Company granted the municipality a mortgage on the property
including improvements. The Company also agreed to maintain a current ratio of
not less than 1.5:1 and a ratio of total liabilities to net worth of not greater
than 1:1, and agreed not to declare or pay cash dividends without the prior
written consent of the bank which purchased the Bond. The Company agreed to
maintain at such bank a compensating balance equal to 10% of


                                       19

<PAGE>


the unpaid balance of the loan in a non-interest bearing account. The
outstanding principal amount of the Bond was approximately $562,000 at February
28, 1998.

            The Company is a party to a number of research and development
agreements under which, at February 28, 1998, the Company had received an
aggregate of approximately $1,087,000. The Company is required to pay royalties
based on sales of any product developed under such agreements, or in the event
of licensing of such products to a third party. The total payments by the
Company, including royalties and licensing fees, will not exceed 150% of the
amounts received under such agreements. As of February 28, 1998, the Company has
paid royalties of $1,061,281 under such agreements.

            At February 28, 1998, the Company had no material capital
commitments. During fiscal 1998, the Company retired 286,310 shares of treasury
stock which were purchased at an aggregate cost of $882,706 during fiscal 1997.

            From time to time, the Company explores various corporate finance
transactions such as business combinations or acquisitions, certain of which may
include the issuance of Company securities. However, the Company has no
agreements or commitments with respect to any particular transaction and there
can be no assurance that any such transaction will be completed.

New Accounting Pronouncements

            During 1997 the Financial Accounting Standards Board (FASB) issued
Statements of Financial Accounting Standards (SFAS) No. 130, "Reporting
Comprehensive Income" and SFAS No. 131, "Disclosures about Segments of an
Enterprise and Related Information," both effective for fiscal years beginning
after December 15, 1997.

            SFAS No. 130 requires disclosure of the components of and total
comprehensive income in the period in which they are recognized in the financial
statements. Comprehensive income is defined as the change in equity (net assets)
of a business enterprise arising from transactions and other events and
circumstances from non-owner sources. It includes all changes in shareholders'
equity during the reporting period except those resulting from investments by
owners and distributions to owners. In accordance with the release, the Company
plans to adopt SFAS No. 130 in the first quarter of 1999.

            SFAS No. 131 requires disclosures of certain segment information
based on the way that management evaluates segments for making decisions and
assessing performance. It also requires disclosure of certain information about
products and services, the geographic areas in which the Company operates, and
major customers. In accordance with the release, the Company plans to adopt SFAS
No. 131 for the year ended February 28, 1999.


                                       20

<PAGE>


Year 2000 Compliance

            As a manufacturer of computer based electro-diagnostic medical
equipment, the Company must determine if software and hardware problems will
occur when the year 2000 arrives. During fiscal 1998 and into fiscal 1999, the
Company's engineers and product specialists have tested and will continue to
test the Company's product line under the year 2000 scenario. As of May 1998,
our testing has not revealed any potential problems with year 2000 compliance.
The Company believes that the cost associated with year 2000 compliance will be
insignificant to the overall operations of the business.

Item 7.     Financial Statements

            The response to this item is submitted in a separate section of this
report. See Table of Contents to Consolidated Financial Statements on page F-1.

Item 8.     Changes in and Disagreements with Accountants on Accounting and
            Financial Disclosure

      None


                                       21

<PAGE>


                                   PART III

            The information called for by Items 9, 10, 11 and 12 of Part III has
been omitted and will be included in the Registrant's proxy statement which will
be filed not later than 120 days after the close of its fiscal year.


                                       22

<PAGE>


                                    PART IV

Item 13.    Exhibits, List and Reports on Form 8-K

(a)   Exhibits.

         3.1     Certificate of Incorporation, Certificate of Amendment to
                 Certificate of Incorporation, Agreement of Merger and
                 Certificate of Merger and By-Laws(1)

         3.2     Certificate of Amendment to Certificate of Incorporation(7)

        10.1     Lease between the Company and Harris Trust & Savings Bank dated
                 August 9, 1983(2)

        10.2     Technology License Agreement between the Company and
                 Neurographic Technologies dated August 13, 1984(3)

        10.3     Real Estate Sale Contract between the Company and First
                 National Bank of Lake Forest, as Trustee, dated December 23,
                 1985(4)

        10.4     Loan Agreement between the Company and Village of Mundelein,
                 Illinois dated as of December 1, 1985(4)

        10.5     Mortgage and Security Agreement between the Company and Village
                 of Mundelein, Illinois dated as of December 1, 1985(4)

        10.6     Bond Purchase Agreement between the Company and First American
                 Bank of Dundee dated as of December 1, 1985(4)

        10.7     Agreement Among Gabriel Raviv, Gil Raviv, Charles Z.
                 Weingarten and the Company(5)

        10.8     Employment Agreement between the Company and Gabriel Raviv(5)

        10.9     Employment Agreement between the Company and Gil Raviv.(5)

       10.10     Form of Export Property Sale, Commission and Lease Agreement
                 between the Company and Bio-logic International
                 Corporation(6)

       10.11     Agreement and General Release between the Company and Gil
                 Raviv(9)

       10.12     Letter dated May 2, 1994 from First American Bank to the
                 Company(10)


                                       23

<PAGE>


       10.13     Letter of Intent dated June 30, 1994 by and among the
                 Company, Luther Medical Products, Inc. and Neuro
                 Diagnostics, Inc.(11)

       10.14     Asset Purchase Agreement dated as of July 1, 1994 by and among
                 the Company, NDI Acquisition Corp., Luther Medical Products,
                 Inc. and Neuro Diagnostics, Inc.(12)

       21.       Subsidiaries of the Company(8)

       23.1      Consent of Independent Auditors

         (b)     Reports on Form 8-K

                 During the three months ended February 28, 1998, no reports on
                 Form 8-K were filed by the Company.

- ----------

(1)   Incorporated by reference from the Company's Registration Statement on
      Form S-18 filed on August 7, 1981 (File No. 2-73587-C).

(2)   Incorporated by reference from the Company's Report on Form 10-Q for the
      quarter ended August 31, 1983.

(3)   Incorporated by reference from the Company's Annual Report on Form 10-K
      for the year ended February 28, 1985.

(4)   Incorporated by reference from the Company's Report on Form 10-Q for the
      quarter ended November 30, 1985.

(5)   Incorporated by reference from the Company's Registration Statement on
      Form S-1 (File No. 33-5471).

(6)   Incorporated by reference from the Company's Report on Form 10-Q for the
      quarter ended May 31, 1986.

(7)   Incorporated by reference from the Company's Annual Report on Form 10-K
      for the Fiscal Year ended February 28, 1987.

(8)   Incorporated by reference from the Company's Annual Report on Form 10-K
      for the Fiscal Year ended February 28, 1990.

(9)   Incorporated by reference from the Company's Annual Report on Form 10-K
      for the Fiscal Year ended February 28, 1993.


                                       24

<PAGE>


(10)  Incorporated by reference from the Company's Annual Report on Form 10-K
      for the Fiscal Year ended February 28, 1994.

(11)  Incorporated by reference from the Company's Report on Form 10-Q for the
      quarter ended May 31, 1994.

(12)  Incorporated by reference from the Company's Report on Form 10-Q for the
      quarter ended August 31, 1994.


                                       25

<PAGE>


                    BIO-LOGIC SYSTEMS CORP. AND SUBSIDIARIES

                               TABLE OF CONTENTS

                                                                          Page
                                                                          ----

REPORT OF  INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS...............         F-2

FINANCIAL STATEMENTS:

   Consolidated Balance Sheets, February 28, 1998 and 1997........         F-3

   Consolidated Statements of Earnings for the Years Ended
      February 28, 1998 and 1997 .................................         F-4

   Consolidated Statements of Shareholders' Equity for the Years
      Ended February 28, 1998 and 1997............................         F-5

   Consolidated Statements of Cash Flows for the Years Ended
      February 28, 1998 and 1997..................................         F-6

   Notes to Consolidated Financial Statements.....................         F-7


                                      F-1

<PAGE>


               REPORT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS


To the Shareholders and Board of Directors of
Bio-logic Systems Corp.:

We have audited the accompanying consolidated balance sheets of Bio-logic
Systems Corp. and subsidiaries as of February 28, 1998 and 1997, and the related
consolidated statements of earnings, shareholders' equity and cash flows for the
years then ended. These financial statements are the responsibility of the
Corporation's management. Our responsibility is to express an opinion on these
financial statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards 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. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the 1998 and 1997 financial statements referred to above present
fairly, in all material respects, the consolidated financial position of
Bio-logic Systems Corp. and subsidiaries as of February 28, 1998 and 1997, and
the consolidated results of their operations and their consolidated cash flows
for the years then ended, in conformity with generally accepted accounting
principles.


                                                            GRANT THORNTON LLP

May 7, 1998


                                      F-2

<PAGE>


                    BIO-LOGIC SYSTEMS CORP. AND SUBSIDIARIES

                          CONSOLIDATED BALANCE SHEETS
                           FEBRUARY 28, 1998 AND 1997

ASSETS                                                1998           1997
                                                      ----           ----

CURRENT ASSETS:
  Cash and cash equivalents                       $  3,624,368    $ 1,134,310
  Marketable securities                              1,500,099      1,291,384
  Accounts receivable, less allowance for
    doubtful accounts of $219,039 in 1998
    and $152,068 in 1997                             4,023,324      3,583,673
  Inventories                                        3,277,811      3,055,429
  Prepaid expenses                                     144,852        141,928
  Deferred income taxes                                311,689        262,039
                                                   -----------    -----------

           Total current assets                     12,882,143      9,468,763

PROPERTY, PLANT AND EQUIPMENT - Net                  2,000,342      1,827,859

MARKETABLE SECURITIES                                               1,501,287

OTHER ASSETS                                           918,752      1,126,493
                                                   -----------    -----------

TOTAL ASSETS                                       $15,801,237    $13,924,402
                                                   ===========    ===========

LIABILITIES AND SHAREHOLDERS' EQUITY

CURRENT LIABILITIES:
  Current maturities of long-term debt            $    135,005    $   126,343
  Accounts payable                                     493,813        484,323
  Accrued salaries and payroll taxes                   699,671        560,676
  Accrued interest and other expenses                  355,163        309,861
  Accrued income taxes                                 601,835         48,931
  Deferred revenue                                     360,235        293,589
                                                   -----------    -----------

           Total current liabilities                 2,645,722      1,823,723

LONG-TERM DEBT - Less current maturities               427,174        562,879

COMMITMENTS

DEFERRED INCOME TAXES                                  293,548        338,398
                                                   -----------    -----------

           Total liabilities                         3,366,444      2,725,000
                                                   -----------    -----------

SHAREHOLDERS' EQUITY:
  Capital stock, $.01 par value; authorized,
    10,000,000 shares; issued and outstanding;
    3,983,104 shares in 1998 and issued
    4,229,519 and outstanding 3,943,209 shares
    in 1997                                             39,831         42,295

  Additional paid-in capital                         4,685,177      5,478,464
  Retained earnings                                  7,709,785      6,561,349
                                                   -----------    -----------

           Total shareholders' equity               12,434,793     12,082,108

  Less treasury stock, at cost: 286,310 shares
    in fiscal 1997                                                    882,706
                                                   -----------    -----------

           Shareholders' equity - net               12,434,793     11,199,402
                                                   -----------    -----------

TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY         $15,801,237    $13,924,402
                                                   ===========    ===========


The accompanying notes are an integral part of these statements.


                                      F-3

<PAGE>


                    BIO-LOGIC SYSTEMS CORP. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF EARNINGS
                     YEARS ENDED FEBRUARY 28, 1998 AND 1997

                                                      1998            1997
                                                      ----            ----

NET SALES                                        $  18,018,689    $14,856,955

COST OF SALES                                        5,703,652      5,140,195
                                                 -------------    -----------

      Gross profit                                  12,315,037      9,716,760
                                                 -------------    -----------

OPERATING EXPENSES:
  Selling, general, and administrative               8,347,149      7,031,332
  Research and development                           2,416,774      1,873,716
                                                 -------------    -----------

       Total operating expenses                     10,763,923      8,905,048
                                                 -------------    -----------

OPERATING INCOME                                     1,551,114        811,712

OTHER INCOME (EXPENSE):
  Interest income                                      219,285        223,591
  Interest expense                                     (45,780)       (52,727)
  Miscellaneous                                           (633)           652
                                                 -------------    -----------

TOTAL OTHER INCOME                                     172,872        171,516
                                                 -------------    -----------

INCOME BEFORE INCOME TAXES                           1,723,986        983,228

PROVISION FOR INCOME TAXES                             575,550        299,383
                                                 -------------    -----------

NET INCOME                                       $   1,148,436    $   683,845
                                                 =============    ===========

NET INCOME PER SHARE:
Basic                                                    $0.29          $0.17
                                                         =====          =====
Diluted                                                  $0.28          $0.17
                                                         =====          =====
                                                                   
AVERAGE NUMBER OF SHARES OUTSTANDING:                              
Basic                                                3,959,864      4,077,273
                                                     =========      =========
Diluted                                              4,117,334      4,140,216
                                                     =========      =========
                                                                  

The accompanying notes are an integral part of these statements.


                                      F-4

<PAGE>


                    BIO-LOGIC SYSTEMS CORP. AND SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
                     YEARS ENDED FEBRUARY 28, 1997 AND 1998

<TABLE>
<CAPTION>
                                                     CAPITAL STOCK
                                               -----------------------     ADDITIONAL
                                               NUMBER OF                     PAID-IN        RETAINED     TREASURY
                                                 SHARES        AMOUNT        CAPITAL        EARNINGS       STOCK           TOTAL
                                               ----------     --------     -----------     ----------    ---------     ------------

<S>                                             <C>           <C>          <C>             <C>           <C>           <C>         
BALANCE, MARCH 1, 1996                          4,229,119     $ 42,291     $ 5,477,516     $5,877,504    $       0     $ 11,397,311

  Purchase of treasury stock                     (286,310)           0               0                    (882,706)        (882,706)

  Exercise of stock options                           400            4             948                                          952

  Net income                                                                                  683,845                       683,845
                                               ----------     --------     -----------     ----------    ---------     ------------
BALANCE, FEBRUARY 28, 1997                      3,943,209     $ 42,295     $ 5,478,464     $6,561,349    $(882,706)    $ 11,199,402

  Retirement of treasury stock                                  (2,863)       (879,843)                    882,706               

  Exercise of stock options                        39,895          399          86,556                                       86,955

  Net income                                                                                1,148,436                     1,148,436
                                               ----------     --------     -----------     ----------    ---------     ------------
BALANCE, FEBRUARY 28, 1998                      3,983,104     $ 39,831     $ 4,685,177     $7,709,785    $       0     $ 12,434,793
                                               ==========     ========     ===========     ==========    =========     ============
</TABLE>


The accompanying notes are an integral part of these statements.


                                      F-5

<PAGE>


                    BIO-LOGIC SYSTEMS CORP. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                     YEARS ENDED FEBRUARY 28, 1998 AND 1997

                                                         1998         1997
                                                         ----         ----

CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income                                         $ 1,148,436    $   683,845
  Adjustments to reconcile net income to net
    cash flows from operating activities:
  Depreciation and amortization                          390,590        328,872
  Provision for bad debts                                 66,971         23,825
  Provision for inventory valuation                      185,079        160,007
  Deferred income tax provision                          (94,500)         8,762
  (Increases) decreases in assets:
    Accounts receivable                                 (506,622)      (410,003)
    Inventories                                         (407,461)      (337,208)
    Prepaid expenses                                      (2,924)       (12,884)
  Increases (decreases) in liabilities:
    Accounts payable                                       9,490        (60,023)
    Accrued liabilities and deferred revenue             250,943         54,851
    Accrued income taxes                                 552,904       (164,804)
                                                     -----------    -----------
       Net cash flows provided by operating
         activities                                    1,592,906        275,240

CASH FLOWS FROM INVESTING ACTIVITIES:
  Capital expenditures                                  (348,332)      (170,904)
  Other assets                                            (7,000)      (137,541)
  Purchases of investments held to maturity                   --     (2,779,542)
  Proceeds from maturities of investments              1,292,572      1,698,631
                                                     -----------    -----------

       Net cash flows (used in) provided by
         investing activities                            937,240     (1,389,356)

CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from exercise of stock options                 86,955            952
  Purchase of treasury stock                                  --       (882,706)
  Payments on long-term debt                            (127,043)      (118,891)
                                                     -----------    -----------

       Net cash flows (used in) provided by
         financing activities                            (40,088)    (1,000,645)

INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS       2,490,058     (2,114,761)

CASH AND CASH EQUIVALENTS - Beginning of year          1,134,310      3,249,071
                                                     -----------    -----------

CASH AND CASH EQUIVALENTS - End of year              $ 3,624,368    $ 1,134,310
                                                     ===========    ===========

SUPPLEMENTAL DISCLOSURES OF CASH FLOWS:
  Cash paid during the period for:
    Interest                                         $    42,840    $    56,084
                                                     ===========    ===========
    Income taxes                                     $   120,834    $   421,790
                                                     ===========    ===========


The accompanying notes are an integral part of these statements.


                                      F-6

<PAGE>


                    BIO-LOGIC SYSTEMS CORP. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                     YEARS ENDED FEBRUARY 28, 1998 AND 1997

1.    BUSINESS

      Bio-logic Systems Corp. (the "Company") develops and markets
      computer-assisted medical diagnostic equipment.  The Company sells
      primarily to the Health Care Industry in North America, Europe and the
      Far East.

2.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

      CONSOLIDATION - The consolidated financial statements include the Company
      and its wholly owned domestic subsidiaries, Neuro Diagnostics, Inc.,
      Bio-logic '83 Research Corp. and Bio-logic International Corp., and its
      wholly owned foreign subsidiaries, Bio-logic Systems Corp., Ltd. and
      Bio-logic FSC International Corp. All significant intercompany balances
      and transactions have been eliminated in consolidation.

      CASH, AND CASH EQUIVALENTS - Cash equivalents include all highly liquid
      investments purchased with maturities of three months or less.

      MARKETABLE SECURITIES - Marketable securities are comprised of US
      Government securities with maturities of more than three months.

      INVENTORIES - Inventories, consisting principally of components, parts and
      supplies, are stated at the lower of cost, determined by the first-in,
      first-out method, or market.

      PROPERTY, PLANT AND EQUIPMENT - Property, plant and equipment are stated
      at cost. The cost of maintenance and repairs is charged to income as
      incurred; significant renewals and betterment's are capitalized.
      Depreciation is provided using straight-line and accelerated methods over
      the estimated useful lives of the assets.

      OTHER ASSETS - Other assets consist primarily of capitalized research and
      development costs, patent cost and the premiums paid on officers' life
      insurance policies. On an ongoing basis, management reviews the valuation
      of other assets to determine if there has been impairment by comparing the
      related assets' carrying value to the undiscounted estimated future cash
      flows and/or operating income from related operations.

      REVENUE RECOGNITION FOR RESEARCH AND DEVELOPMENT CONTRACTS - Revenue from
      research and development contracts is recognized as related costs are
      incurred.


                                      F-7
<PAGE>


      INCOME TAXES - Deferred tax assets and liabilities are computed annually
      for differences between financial statement basis and tax basis of assets
      and liabilities using enacted tax rates for the years in which the
      difference are expected to become recoverable. A valuation allowance is
      established where necessary to reduce deferred tax assets to the amount
      expected to be realized.

      Deferred federal income taxes are not provided for the undistributed
      earnings of the Company's foreign subsidiary. Undistributed foreign
      earnings were approximately $1,418,000 and $1,116,000 as of February 28,
      1998 and 1997, respectively.

      USE OF ESTIMATES - In preparing financial statements in conformity with
      generally accepted accounting principles, management is required to make
      estimates and assumptions that affect the reported amounts of assets and
      liabilities, the disclosure of contingent assets and liabilities at the
      date of the financial statements, and the reported amounts of revenues and
      expenses during the reporting period. Actual results could differ from
      those estimates.

      FAIR VALUE OF FINANCIAL INSTRUMENTS - The Company's financial instruments
      include cash equivalents, marketable securities, accounts receivable,
      accounts payable and bank overdrafts, and long-term debt. The carrying
      value of cash equivalents, short-term marketable securities, accounts
      receivable and accounts payable and bank overdrafts approximate their fair
      value because of the short-term nature of these instruments. The carrying
      value of long-term debt approximates fair value based on quoted prices of
      similar issuances at the reporting date.

      EARNINGS PER SHARE - The Company has adopted Statement of Financial
      Accounting Standards (SFAS) No. 128, "Earnings per Share," as of December
      31, 1997. This statement established new standards for computing and
      disclosing earnings per share. In accordance with SFAS No. 128, all
      earnings per share amounts for prior periods have been restated to conform
      with the new standard.

      RECENTLY ISSUED ACCOUNTING STANDARDS - During fiscal 1998 the Financial
      Accounting Standards Board (FASB) issued Statements of Financial
      Accounting Standards (SFAS) No. 130, "Reporting Comprehensive Income" and
      SFAS No. 131, "Disclosures and Segments of an Enterprise and Related
      Information," both effective for fiscal years beginning
      after December 15, 1997.

      SFAS No. 130 requires disclosure of the components of and total
      comprehensive income in the period in which they are recognized in the
      financial statements. Comprehensive income is defined as the change in
      equity (net assets) of a business enterprise arising from transactions and
      other events and circumstances from non-owner sources. It includes all
      changes in shareholders' equity during the reporting period except those
      resulting from investments by owners and distributions to owners. In
      accordance with the release, the Company plans to adopt SFAS No. 130 in
      the first quarter of 1999.


                                      F-8

<PAGE>


      SFAS No. 131 requires disclosures of certain segment information based on
      the way that management evaluates segments for making decisions and
      assessing performance. It also requires disclosure of certain information
      about products and services, the geographic areas in which the Company
      operates, and major customers. In accordance with the release, the Company
      plans to adopt SFAS No. 131 for the year ended February 28, 1999.


3.    MARKETABLE SECURITIES

      The Company's entire portfolio of debt securities has been classified as
      held-to-maturity and is stated at cost, with premiums amortized and
      discounts accreted using the simple-interest method. For fiscal 1997,
      marketable debt securities with remaining maturities in excess of twelve
      months have been classified as non-current.

      The amortized cost, unrealized gains, unrealized losses and estimated fair
      values of investments securities held-to-maturity are summarized as
      follows:

                                             Gross       Gross     Estimated
                               Amortized  Unrealized   Unrealized     Fair
                                  Cost       Gains       Losses      Value
                               ---------  ----------   ----------  ---------

      February 28, 1998
      -----------------

      US Government
      securities               $1,500,099     $846      $       0  $1,500,945
                               ==========     ====      =========  ==========

      February 28, 1997
      -----------------

      US Government
      securities               $2,792,671    $3,462     $       0  $2,796,133
                               ==========    ======     =========  ==========


                                      F-9

<PAGE>

4.   PROPERTY, PLANT AND EQUIPMENT

     Property, plant and equipment comprise the following at February 28, 1998
     and February 28, 1997:

                                                                   Estimated
                                                                 Useful Lives
                                             1998       1997      (in Years)
                                             ----       ----     ------------
     Land                                $  676,534 $  676,534
     Building                             1,117,907  1,117,907        40
     Test and shop equipment              1,105,103    915,070         5
     Booths and exhibits                    101,531    101,531         5
     Office furniture and equipment       1,564,053  1,405,754         7
     Transportation equipment               123,799    123,799         3
     Building improvements                  121,651    121,651        15
                                         ---------- ----------
     Total                                4,810,578  4,462,246
                                         ---------- ----------
     Less accumulated depreciation        2,810,236  2,634,387
                                         ---------- ----------
     Property, plant and equipment - net $2,000,342 $1,827,859
                                         ========== ==========

     Depreciation expense amounted to $175,849 and $206,856 for 1998 and 1997,
     respectively.

5.   CAPITALIZED RESEARCH AND DEVELOPMENT COSTS

     Capitalized research and development expense consists of costs incurred
     from when the product is determined to be technologically feasible to the
     time the product is available for general release to customers. These costs
     consist primarily of internal research and development labor costs and
     outside development costs for software and related engineering prototypes
     necessary in the final design of new products. Capitalized research and
     development costs are amortized over a 5 year period, which approximates
     the expected life of the product.

     Unamortized research and development costs amounted to $547,982 and
     $723,967 at February 28, 1998 and February 28, 1997, respectively.
     Amortization expense amounted to $182,985 and $90,503 in 1998 and 1997
     respectively.


                                      F-10
<PAGE>


6.   OPERATING LEASES

     The Company leases office and assembly facilities under long-term operating
     leases expiring from 2001 to 2009. Total rental expense amounted to $60,013
     and $55,521 for 1998 and 1997, respectively.

     Future minimum annual rental commitments under these leases for the years
     ending after February 28, 1998 are as follows:

                    1999                            $ 50,776
                    2000                              50,776
                    2001                              47,819
                    2002                              15,292
                    2003                              15,292
                    Thereafter                        91,752


7.   LONG-TERM DEBT

     Borrowings of $1,600,000 under the Industrial Development Bond, Series 1985
     (the "Bond") are due in varying monthly installments through December 2001.
     The interest rate on the Bond (6.8%) is 80 percent of the prime rate (8.50
     percent at February 28, 1998). The office building and land are pledged as
     collateral for the Bond.

     The Company has obtained a commitment, renewed annually, for an unsecured
     $1,000,000 bank line of credit with interest at the bank's prime rate. No
     borrowings have been made under the line of credit as of either February
     28, 1998 or February 28, 1997.

     Under the terms of the Bond agreement and the line of credit, the Company
     is to maintain average available non-interest-bearing deposits in amounts
     not less than ten percent of the unpaid balance of the Bond at the bank
     which purchased the Bond. The Company is also required to maintain certain
     minimum working capital and net worth ratios. The Bond agreement restricts
     the payment or declaration of dividends (other than dividends payable in
     stock) without the prior consent of the holder of the Bond.

     Annual maturities of the Bond are as follows:

                    1999                            $135,005
                    2000                             144,262
                    2001                             154,153
                    2002                             128,759
                                                    --------
                                                    $562,179
                                                    ========

                                      F-11

<PAGE>


8.   INCOME TAXES

     The provision for income taxes is as follows:

                                          1998               1997
                                          ----               ----
                  Current:
                    Federal             $527,650          $206,788
                    State                109,600            32,900
                    Foreign               32,800            50,933
                                        --------          --------
                    Total current        670,050           290,621
                  Deferred               (94,500)            8,762
                                        --------          --------
                  Total                 $575,550          $299,383
                                        ========          ========

     The provision for income taxes differs from the U.S. Federal statutory rate
     as follows:

                                                     1998             1997
                                                     ----             ----
      U.S. Federal statutory rate                    34.0%            34.0%
      Difference in foreign tax rate                 (4.7)            (6.2)
      Foreign Sales Corporation (FSC) operations      (.9)            (1.5)
      State income taxes, net of Federal
        income tax benefit                            3.5              2.2
      Other                                           1.5              1.9
                                                     ----             ----
      Effective income tax rate                      33.4%            30.4%
                                                     ====             ====


     Deferred tax assets and liabilities as of February 28, 1998 and 1997
     consist of the following:

                                                      1998             1997
                                                      ----             ----
      Deferred tax liabilities:
         Depreciation                               $ 81,715         $ 58,458
         Research and development                    211,833          279,940
                                                    --------         --------
      Total deferred tax liabilities                 293,548          338,398
                                                    --------         --------

      Deferred tax assets:
         Accounts receivable                          84,835           58,770
         Inventory                                    91,635           82,488
         Vacation                                     18,765           21,327
         Warranty                                    116,454           99,454
                                                    --------         --------
      Total deferred tax assets                      311,689          262,039
                                                    --------         --------
      Net deferred tax (asset) liability            $(18,141)        $ 76,359
                                                    ========         ========

                                      F-12

<PAGE>


9.   STOCK OPTIONS AND WARRANTS

     The Company's 1994 Incentive Stock Option Plan (the "Plan") permits the
     granting of both incentive stock options and nonqualified options for
     option periods not to exceed ten years. The Plan provides for the granting
     of up to 850,000 shares of incentive stock options at a per share price not
     less than 100 percent of the fair market value on the date of grant. In the
     case of nonqualified options, the per share price may be at any amount
     determined by the Board of Directors or the Stock Option Committee on the
     date of grant, but not less than par value. Currently outstanding options
     become exercisable one to five years from the grant date and expire five to
     ten years after the grant date.

     The Company has adopted only the disclosure provisions of SFAS No. 123,
     "Accounting for Stock-Based Compensation." It applies Accounting Principles
     Board Opinion No. 25, "Accounting for Stock Issued to Employees," and
     related interpretations in accounting for its plans and does not recognize
     compensation expense for its stock-based compensation plans when options
     are granted at fair value at the date of grant. If the Company had elected
     to recognize compensation expense based upon the fair value at the grand
     date for awards under these plans consistent with the methodology
     prescribed by SFAS No. 123, the Company's net income and earnings per share
     would be reduced to the pro forma amounts indicated below:

                              Fiscal Year Ended     Fiscal Year Ended
                                Feb. 28, 1998          Feb. 28, 1997
                              -----------------     -----------------

      Net Income
        As Reported              $1,148,436             $683,845
        Pro Forma                $1,047,273             $627,878

      Net Income per share

      As Reported - Basic             $0.29                $0.17
                  - Diluted           $0.28                $0.17

      Pro forma   - Basic             $0.26                $0.15
                  - Diluted           $0.25                $0.15


                                      F-13


<PAGE>


     These pro forma amounts may not be representative of future disclosures
     because they do not take into effect pro forma compensation expense related
     to grants made before fiscal 1996. The fair values of these options was
     estimated at the date of grant using the Black-Scholes option-pricing model
     with the following weighted average assumptions for the years ended
     February 28, 1998 and 1997, respectively: no dividends; expected volatility
     of 71% and 49%, risk free interest rates of 6.2% and 6.3% and expected life
     of 8.6 and 7.8 years. The weighted average exercise price of options
     granted during the years ended February 28, 1998 and 1997 for which the
     exercise price exceeds the market price on the grant date was $4.58 and
     $3.30, respectively, and the weighted average fair value prices were $2.56
     and $1.44, respectively. The weighted average exercise price of options
     granted during the years ended February 28, 1998 and 1997 for which the
     exercise price equals the market price on the grant date was $3.28 and
     $2.89, respectively, and the weighted average fair value prices were $2.65
     and $2.00, respectively. The weighted average exercise price of options
     granted during the year ended February 28, 1997 for which the exercise
     price is below the market price on the grant date was $2.71 and the
     weighted average fair price was $2.05. There were no options granted during
     the year ended February 28, 1998 for which the exercise price is below the
     market price on the grant date.

     The following tables summarize information concerning outstanding and
     exercisable stock options as of February 28, 1998:

                                       Weighted Average
                                           Remaining
        Range of          Number       Contractual Life   Weighted Average
     Exercise Price     Outstanding         (years)         Exercise Price
     --------------     -----------    ----------------   ----------------
      $1.50-$2.50        111,613            5.34               $2.03
      $2.51-$4.50        290,850            6.66                2.99
      $4.51-$6.50         65,000            5.88                4.64
                         -------
                         467,463
                         =======

                    Range of          Number       Weighted Average
                 Exercise Price     Exercisable     Exercise Price
                 --------------     -----------    ----------------
                   $1.50-$2.50         91,863            $1.98
                   $2.51-$4.50        109,987             2.83
                   $4.51-6.50           7,000             4.89
                                      -------
                                      208,850
                                      =======


                                      F-14

<PAGE>


Additional information with respect to the Company's plan at February 28, 1998
and 1997, are as follows:

                                  FISCAL 1998
                                  -----------
                                                       Weighted Average
                                         Shares        Exercise Price
                                         ------        ----------------
Shares Under Option:
   Outstanding at beginning of year     368,508              $2.56
   Granted                              156,300              $3.65
   Exercised                            (39,595)             $2.17
   Forfeited                            (17,750)             $2.55
                                        -------
   Outstanding at end of year           467,463              $2.99
                                        =======
   Options exercisable at year-end      208,850              $2.53
                                        =======
   Weighted average fair value for
     stock options granted during 1998                       $2.62


                                  FISCAL 1997
                                  -----------
                                                       Weighted Average
                                          Shares        Exercise Price
                                          ------       ----------------
Shares Under Option:
   Outstanding at beginning of year      311,008             $2.49
   Granted                                78,000             $3.01
   Exercised                                  --                --
   Forfeited                             (20,500)            $3.20
                                         -------
   Outstanding at end of year            368,508             $2.56
                                         =======

   Options exercisable at year-end       198,508             $2.34
                                         =======
   Weighted average fair value for
     stock options granted during 1997                       $1.77


     In connection with the Company's 1986 stock offering, 258,750 warrants
     (including 33,750 to the underwriter) were issued. Each warrant entitles
     the holder to purchase one and one-half shares of common stock at an
     exercise price of $8.33 per share, subject to adjustment at any time
     commencing after the separation date, August 27, 1986, until May 31, 1999.
     The warrants are subject to redemption by the Company at $.05 per warrant
     on 30 days' prior written notice, provided the closing price of the
     Company's common stock exceeds $11.67 per share for 20 consecutive trading
     days ending within 30 days of the date of notice.


                                      F-15

<PAGE>

10.  RESEARCH AND DEVELOPMENT ARRANGEMENTS

     In 1986, 1989 and 1991 and 1992, the Company entered into research and
     development agreements with a third party under which the Company received
     approximately $400,000, $396,000, $126,700 and $164,300 respectively, or an
     aggregate of $1,087,000. The Company is required to pay royalties on the
     sales of products developed under the grants, as well as a percentage of
     any licensing fees for agreements entered into with other companies for the
     sales of developed products. Royalties paid under these agreements amounted
     to approximately $138,000 and $130,000 in 1998 and 1997, respectively.

11.  EXPORT SALES

     Net foreign export sales are summarized as follows:

                                          1998             1997
                                          ----             ----
                  Europe               $  730,483       $1,121,114
                  Far East              2,252,682        1,857,117
                  Other                   940,894          627,244
                                       ----------       ----------
                  Total                $3,924,059       $3,605,475
                                       ==========       ==========


     No significant sales were made by foreign subsidiaries in 1998 and 1997.

12.  EMPLOYEE BENEFIT PLAN

     The Company has a retirement plan under Section 401(k) of the Internal
     Revenue Code which allows employees to defer a portion of their income on a
     pretax basis through contributions to the plan. Employee contributions are
     matched by the Company at varying rates. The Company may also make
     discretionary contributions to the plan. Total contributions of $78,339 and
     $59,506 were made by the Company in 1998 and 1997, respectively.

13.  EMPLOYMENT AGREEMENTS

     The Company has executed an employment agreement with one of its key
     officers. Under the terms of the agreement, which extends through May 1998,
     the Company is obligated to pay contractually specified amounts in the
     event of the key officer's termination, disability or death.

14.  TREASURY STOCK RETIREMENT

     During fiscal 1998, 286,310 shares of the Corporation's common stock
     purchased in fiscal 1997 for a total cost of $882,706 and held as treasury
     stock as of February 28, 1997, were retired.


                                      F-16


<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.


                                          BIO-LOGIC SYSTEMS CORP.

Date:  May 27, 1998

                                          By: /s/
                                             ---------------------------------
                                              Gabriel Raviv, President

      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.


/s/                                 President, Chief Executive    May 29, 1998
- ---------------------------         Officer, Director (Principal 
Gabriel Raviv                       Executive Officer)           
                                    

/s/                                  Director                     May 29, 1998
- ---------------------------
Charles Z. Weingarten, M.D.

                                                        
/s/                                 Controller                    May 29, 1998 
- ---------------------------         (Principal Financial Officer)               
James M. Smearman                   


/s/                                 Director                      May 29, 1998
- ---------------------------
Gil Raviv


/s/                                 Director                      May 29, 1998
- ---------------------------
Irving Kupferberg


/s/                                 Director                      May 29, 1998
- ---------------------------
Albert Milstein


/s/                                 Director                      May 29, 1998
- ----------------------------
Craig W. Moore


<PAGE>


                                 EXHIBIT INDEX

Exhibit                                                               Page
 Number                         Description                          Number
- -------                         -----------                          ------

  3.1       Certificate of Incorporation, Certificate of Amendment
            to Certificate of Incorporation, Agreement of Merger
            and Certificate of Merger and By-Laws(1)

  3.2       Certificate of Amendment to Certificate of
            Incorporation(7)

  10.1      Lease between the Company and Harris Trust & Savings
            Bank dated August 9, 1983(2)

  10.2      Technology License Agreement between the Company
            and Neurographic Technologies dated August 13, 1984(3)

  10.3      Real Estate Sale Contract between the Company and
            First National Bank of Lake Forest, as Trustee, dated
            December 23, 1985(4)

  10.4      Loan Agreement between the Company and Village of
            Mundelein, Illinois dated as of December 1, 1985(4)

  10.5      Mortgage and Security Agreement between the
            Company and Village of Mundelein, Illinois dated
            as of December 1, 1985(4)

  10.6      Bond Purchase Agreement between the Company and First
            American Bank of Dundee dated as of December 1, 1985(4)

  10.7      Agreement Among Gabriel Raviv, Gil Raviv, Charles Z.
            Weingarten and the Company (5)

  10.8      Employment Agreement between the Company and
            Gabriel Raviv(5)

  10.9      Employment Agreement between the Company and
            Gil Raviv(5)

  10.10     Form of Export Property Sale, Commission and Lease


<PAGE>

            Agreement between the Company and Bio-logic
            International Corporation(6)

  10.11     Agreement and General Release between the Company
            and Gil Raviv(9)

  10.12     Letter dated May 2, 1994 from First American Bank
            to the Company (10)

  10.13     Letter of Intent dated June 30, 1994 by and among the
            Company, Luther Medical Products, Inc. and Neuro
            Diagnostics, Inc.(11)

  10.14     Asset Purchase Agreement dated as of July 1, 1994
            by and among the Company, NDI Acquisition Corp.,
            Luther Medical Products, Inc. and Neuro
            Diagnostics, Inc.(12)

  21.       Subsidiaries of the Company(8)

  23.1      Consent of Independent Auditors

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

(1)         Incorporated by reference from the Company's Registration Statement
            on Form S-18 filed on August 7, 1981 (File No. 2-73587-C).

(2)         Incorporated by reference from the Company's Report on Form 10-Q for
            the quarter ended August 31, 1983.

(3)         Incorporated by reference from the Company's Annual Report on Form
            10-K for the year ended February 28, 1985.

(4)         Incorporated by reference from the Company's Report on Form 10-Q for
            the quarter ended November 30, 1985.

(5)         Incorporated by reference from the Company's Registration Statement
            on Form S-1 (File No. 33-5471).

(6)         Incorporated by reference from the Company's Report on Form 10-Q for
            the quarter ended May 31, 1986.

(7)         Incorporated by reference from the Company's Annual Report on Form
            10-K for the Fiscal Year ended February 28, 1987.

(8)         Incorporated by reference from the Company's Annual Report on Form
            10-K for the Fiscal Year ended February 28, 1990.


<PAGE>



(9)         Incorporated by reference from the Company's Annual Report on Form
            10-K for the Fiscal Year ended February 28, 1993.

(10)        Incorporated by reference from the Company's Annual Report on Form
            10-K for the Fiscal Year ended February 28, 1994.

(11)        Incorporated by reference from the Company's Report on Form 10-Q for
            the quarter ended May 31, 1994.

(12)        Incorporated by reference from the Company's Report on Form 10-Q for
            the quarter ended August 31, 1994.




                                                                    EXHIBIT 23.1
                                  

                         INDEPENDENT AUDITORS' CONSENT

      We consent to the incorporation by reference in Registration Statement No.
33-3776 of Bio-logic Systems Corp. on Form S-8 of our report, dated May 7, 1998,
appearing in this Annual Report on Form 10-KSB of Bio-logic Systems Corp. for
the year ended February 28, 1998.



 
                                                  GRANT THORNTON LLP

May 27, 1998



<TABLE> <S> <C>


<ARTICLE>                     5
<MULTIPLIER>                                   1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                             FEB-28-1998
<PERIOD-END>                                  FEB-28-1998
<CASH>                                          3,624,368
<SECURITIES>                                    1,500,009
<RECEIVABLES>                                   4,023,324
<ALLOWANCES>                                      219,039
<INVENTORY>                                     3,277,811
<CURRENT-ASSETS>                               12,882,143
<PP&E>                                          4,810,578
<DEPRECIATION>                                  2,810,236
<TOTAL-ASSETS>                                 15,801,237
<CURRENT-LIABILITIES>                           2,645,722
<BONDS>                                           562,179
                                   0
                                             0
<COMMON>                                           39,831
<OTHER-SE>                                     12,394,962
<TOTAL-LIABILITY-AND-EQUITY>                   15,801,237
<SALES>                                        18,018,689
<TOTAL-REVENUES>                               18,018,689
<CGS>                                           5,703,652
<TOTAL-COSTS>                                   5,703,652
<OTHER-EXPENSES>                                        0
<LOSS-PROVISION>                                   66,971
<INTEREST-EXPENSE>                                 45,780
<INCOME-PRETAX>                                 1,723,986
<INCOME-TAX>                                      575,550
<INCOME-CONTINUING>                                     0
<DISCONTINUED>                                          0
<EXTRAORDINARY>                                         0
<CHANGES>                                               0
<NET-INCOME>                                    1,148,436
<EPS-PRIMARY>                                        0.29
<EPS-DILUTED>                                        0.28
                                               


</TABLE>


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