INPUT OUTPUT INC
8-K, 1998-11-30
MEASURING & CONTROLLING DEVICES, NEC
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<PAGE>

                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549


                                   FORM 8-K


                                CURRENT REPORT



                        Pursuant to Section 13 or 15(d)
                    of the Securities Exchange Act of 1934



     Date of Report (Date of earliest event reported):  November 16, 1998
                                                       -------------------

                                       
                               Input/Output, Inc.
                               ------------------
            (Exact name of registrant as specified in its charter)


                                   Delaware
                                   --------
                (State or other jurisdiction of incorporation)


        1-13402                                            22-2286646
- ------------------------                       ---------------------------------
(Commission File Number)                       (IRS Employer Identification No.)


11104 West Airport Blvd., Stafford, Texas                     77477
- --------------------------------------------------------------------------------
(Address of principal executive offices)                   (Zip Code)


      Registrant's telephone number, including area code  (281) 933-3339
                                                         ----------------

                                       
                                 Not Applicable
- --------------------------------------------------------------------------------
        (Former name or former address, if changed since last report)

<PAGE>

ITEM 5.  OTHER EVENTS.

     On November 16, 1998, Input/Output, Inc., a Delaware corporation (the 
"Company"), pursuant to the terms of an Agreement and Plan of Merger (the 
"Agreement") by and among the Company, I/O Marine, Inc., a Louisiana 
corporation and wholly-owned subsidiary of the Company ("I/O Marine"), 
DigiCourse, Inc., a Louisiana corporation ("DigiCourse"), and The Laitram 
Corporation, a Louisiana corporation and the sole stockholder of DigiCourse 
(the "Stockholder"), acquired, through the merger of I/O Marine with and into 
DigiCourse, 100% of the issued and outstanding capital stock of DigiCourse 
from the Stockholder.  The consideration paid by the Company in exchange for 
the DigiCourse stock in the merger was the issuance of 5,794,000 shares of 
common stock, par value $0.01 per share, of the Company (the "Common Stock") 
in a transaction exempt from registration under the Securities Act of 1933, 
as amended (the "1933 Act"), pursuant to Section 4(2) thereof.  As a result, 
the number of shares beneficially owned by the Stockholder represents 
approximately 11.7% of the outstanding Common Stock of the Company. The 
Agreement provides for certain cash purchase price adjustments to be effected 
following the closing of the acquisition. 

     DigiCourse and its wholly-owned subsidiary, DigiCourse Limited, a United 
Kingdom corporation, design, manufacture and service marine positioning 
systems for the seismic industry, including birds (which control streamer 
cable depth during towing), compasses and acoustical devices.  The Company 
presently intends to continue operating the business and assets of DigiCourse 
in a manner similar to that in which they were operated prior to the 
acquisition.

     The Company also granted registration rights to the Stockholder pursuant 
to a Registration Rights Agreement, dated November 16, 1998.  The 
Registration Rights Agreement grants piggyback registration rights, which 
allow the Stockholder to participate in underwritten public offerings 
initiated by the Company after the closing date of the acquisition, subject 
to certain limitations and conditions set forth therein.  In addition, the 
Registration Rights Agreement grants the Stockholder two demand registration 
rights, subject to certain limitations and conditions, including the 
requirement that each such demand registration shall not be made for less 
than one million (1,000,000) shares of Common Stock.  The Registration Rights 
Agreement contains provisions whereby the Company has agreed to indemnify the 
Stockholder against certain liabilities, including liabilities under the 
1933 Act.

     The terms of the Agreement provide that the acquisition shall be 
accounted for as occurring effective as of September 30, 1998.  The Company 
will account for its acquisition of DigiCourse as a purchase business 
combination for financial accounting purposes.

     The foregoing, to the extent it summarizes terms of agreements, is 
qualified in its entirety by reference to the full text of such documents, 
copies of which have been filed herewith as exhibits and are incorporated 
herein by reference.

ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS.

         99.1  Agreement and Plan of Merger by and among I/O Marine, Inc., 
               Input/Output, Inc., DigiCourse, Inc. and The Laitram 
               Corporation, dated September 30, 1998.  Filed as Exhibit 10.1 
               to the Company's Form 10-Q for the quarter ended August 31, 
               1998 and incorporated by reference herein.


                                 Page 2 of 3
<PAGE>

         99.2  Registration Rights Agreement, dated November 16, 1998.



                                  SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the 
registrant has duly caused this report to be signed on its behalf by the 
undersigned hereunto duly authorized.

                                       INPUT/OUTPUT, INC.



                                       By: /s/ RONALD A. HARRIS
                                          ------------------------------
                                           Ronald A. Harris
                                           Vice President and Controller

Date: November 30, 1998





                                  Page 3 of 3


<PAGE>

                             AGREEMENT AND PLAN OF MERGER


       This AGREEMENT and PLAN OF MERGER (the "Agreement") is made and entered
into as of September 30, 1998, by and among I/O Marine, Inc. ("I/O Marine"), a
Louisiana corporation; Input/Output, Inc. ("I/O"), a Delaware corporation and
the sole stockholder of I/O Marine; DigiCourse, Inc. ("DigiCourse"), a Louisiana
corporation; and The Laitram Corporation ("Stockholder"), a Louisiana
corporation and the sole stockholder of DigiCourse.  I/O, I/O Marine, DigiCourse
and Stockholder are each a "party" and collectively are the "parties" to this
Agreement.

                                RECITALS

       The Boards of Directors of each of the parties have each approved the
merger of I/O Marine with and into DigiCourse (the "Merger"), pursuant to the
terms and subject to the conditions of this Agreement.  Each party desires to
make certain representations, warranties and agreements in connection with the
Contemplated Transactions (defined below).  The parties intend, for federal
income Tax purposes, that the Contemplated Transactions shall qualify as a
reorganization under the provisions of Section 368 of the Internal Revenue Code
of 1986, as amended, and related rules and regulations ("Code").

       It is the intent of the parties that, as of September 30, 1998, at 11:59
P.M., all economic benefits and risks of any kind and nature of DigiCourse are
transferred from Stockholder to the Surviving Corporation.  To the extent any
provision of this Agreement and its exhibits is in conflict with this
aforementioned principle, the parties agree that this principle shall be
controlling.

       NOW, THEREFORE, in consideration of the mutual benefits to be derived and
the representations and warranties, conditions, covenants and promises herein
contained, and other good and valuable consideration the receipt and sufficiency
of which are hereby acknowledged, the parties agree as follows:

1.     DEFINITIONS

       For purposes of this Agreement, the following terms have the meanings
specified or referred to in this Section 1:

       "ACCOUNTING PROCEDURES" are defined in the attached Exhibit 1.

       "ACCOUNTS RECEIVABLE" is defined in Section 3.8.

       "ACQUISITION" is defined in Section 9.29.

       "ADVERSE CONSEQUENCES" means all actions, suits, proceedings, hearings,

<PAGE>

investigations, charges, complaints, claims, demands, injunctions, judgments,
orders, decrees, rulings, damages, dues, penalties, fines, costs, liabilities,
obligations, liens, losses, expenses, and fees, including court costs and
attorneys' fees and expenses, that have a net adverse effect on the financial
position of a Person.
       
       "AFFILIATE" means any person that, directly or indirectly, controls, or
is controlled by or under common control with, another person.  For the purposes
of this definition, "CONTROL" (including the terms "CONTROLLED BY" and "UNDER
COMMON CONTROL WITH"), as used with respect to any person, means the power to
direct or cause the direction of the management and policies of the person,
directly or indirectly, whether through the ownership of voting securities, by
contract or otherwise.

       "APPLICABLE CONTRACT" means any Contract under which, prior to the
Economic Closing Date, (a) DigiCourse or Limited has or may acquire any rights,
(b) DigiCourse or Limited has or may become subject to any obligation or
liability, or (c) any asset owned or used by DigiCourse or Limited  is or may
become bound.

       "BALANCE SHEET" is defined in Section 3.4.

       "BREACH" means any material inaccuracy, breach, failure, claim,
occurrence, or circumstance that breaches a representation, warranty, covenant,
obligation, or other provision of this Agreement or any instrument delivered
pursuant to Section 2.4 of this Agreement.  A "Breach" will be deemed to have
occurred if there is or has been any material inaccuracy in or material breach
of, or any material failure to perform or comply with, such representation,
warranty, covenant, obligation, or other provision. 

       "CERTIFICATE OF MERGER" is defined in Section 2.1.

       "CLOSING" is defined in Section 2.4.

       "CLOSING DATE" means the date on which the Closing actually takes place.

       "ECONOMIC CLOSING NET WORKING CAPITAL" is defined in Section 2.5.

       "CODE" is defined in the Recitals of this Agreement.

       "CONSENT" means any approval, consent, ratification, waiver or other
authorization (including any Governmental Authorization).

       "CONSTITUENT CORPORATIONS" is defined in Section 2.2.

       "CONTEMPLATED TRANSACTIONS" means all of the transactions contemplated by
this Agreement, including:


                                       2
<PAGE>

       (a)    the Merger and the delivery of the shares of I/O Common Stock in
accordance with Section 2 hereof; and

       (b)    the execution, delivery, and performance of all agreements
contemplated by this Agreement.

       "CONTRACT" means any material agreement, contract, promise or undertaking
that is legally binding.

       "COPYRIGHTS" is defined in Section 3.21.

       "DEFICIT NET WORKING CAPITAL" is defined in Section 2.5.

       "DIGICOURSE" is defined in the first paragraph of this Agreement.

       "DISCLOSURE LETTER" means the disclosure letter delivered by DigiCourse
to I/O within fifteen (15) days after the date of the signing of this Agreement,
as it may be supplemented under Section 9.17.
       
       "DOCUMENTATION" means all documents, other written material (including
user and support manuals, flowcharts and other supporting documentary,
architecture documents, design documents, requirements documents, specifications
documents and computer material), stored in any medium, and source codes which
have been created by or at the request of DigiCourse or Limited, or acquired by
DigiCourse or Limited, relating to, explaining or assisting in the use of
Products.

       "ECONOMIC CLOSING DATE" means September 30, 1998.

       "EFFECTIVE TIME" shall have the same meaning as defined in Section 2.1.

       "ENCUMBRANCE" means any pledge, security interest or encumbrance of any
kind.

       "ENVIRONMENT" means soil, land surface or subsurface strata, surface
waters (including navigable waters, ocean waters, streams, ponds, drainage
basins, and wetlands), groundwaters, drinking water supply, stream sediments,
ambient air (including indoor air), plant and animal life and any other
environmental medium or natural resource.

       "ENVIRONMENTAL, HEALTH, AND SAFETY LIABILITIES" means any cost, damages,
expense, liability, obligation, or other responsibility arising from or under
Environmental Law or Occupational Safety and Health Law.


                                       3
<PAGE>

       "ENVIRONMENTAL LAW" means any Legal Requirement that relates to (a) the
control of any potential pollutant or protection of the air, water or land, (b)
solid, gaseous or liquid waste generation, handling, treatment, storage,
disposal or transportation, and (c) exposure to hazardous, toxic or other
substances alleged to be harmful.

       "ERISA" means the Employee Retirement Income Security Act of 1974 or any
successor law, and regulations and rules issued pursuant to that Act or any
successor law.

       "EXCESS NET WORKING CAPITAL" is defined in Section 2.5.

       "FACILITIES" means any real property, leaseholds, or other interests
currently or formerly owned or operated by DigiCourse or Limited and any
buildings, plants, structures, or equipment currently or formerly owned or
operated by DigiCourse or Limited. 

       "GAAP" means generally accepted United States accounting principles then
applicable.

       "GOVERNMENTAL AUTHORIZATION" means any Consent or license made available
by or under the authority of any Governmental Body pursuant to any Legal
Requirement.

       "GOVERNMENTAL BODY" means any:

       (a)    nation, state, county, parish, city, town, village, district, or
other governmental jurisdiction of any nature;

       (b)    federal, state, local, municipal, foreign, or other government;

       (c)    governmental or quasi-governmental authority of any nature
(including any governmental agency, branch, department, official, or entity and
any court or other tribunal); or

       (d)    body exercising, or entitled to exercise, any administrative,
executive, judicial, legislative, police, regulatory, or taxing authority or
power of any governmental nature.

       "HSR" is defined in Section 6.8.

       "INDEMNIFIED PERSON" is defined in Section 8.4.

       "INTELLECTUAL PROPERTY ASSETS" is as defined in Section 3.21.

       "INTERIM BALANCE SHEET" is defined in Section 3.4.

       "INVESTMENT LETTER" is defined in Section 2.4.


                                       4
<PAGE>

       "I/O" is defined in the Recitals of this Agreement.

       "I/O COMMON STOCK" means the common stock of I/O, par value $0.01 per
share.
       
       "I/O INDEMNIFIED PERSON" is defined in Section 8.2.
       
       "I/O MARINE" is defined in the Recitals of this Agreement.
       
       "I/O MARINE COMMON STOCK" is defined in Section 5.5.

       "KMPG" means the public accounting firm of KMPG Peat Marwick LLP.

       "KNOWLEDGE" or "KNOWN" means any fact that is actually known by any of
the following individuals: 
       
              (a)    in the case of Stockholder and DigiCourse, the following
       individuals - James M. Lapeyre, Jr., Roy Kelm, Lawrence P. Oertling,
       Barry L. LaCour, James W. Evans, Robbert W. Vorhoff, James T. Cronvich or
       Franck F. LaBiche; and 
       
              (b)    in the case of I/O and I/O Marine, the following
       individuals - Zeke Zeringue, Axel Sigmar, Gay Mayeux, Ronald Harris,
       Chris Wolfe, George Gentry, Thomas Connolly or Robert Brindley.

       "LBCL" means the Louisiana Business Corporation Law.

       "LEGAL REQUIREMENT" means any legally binding order, constitution, law,
ordinance, regulation, statute, or treaty of a Governmental Body.

       "LIMITATIONS" is defined in Section 3.6(b).

       "LIMITED" is defined in Section 3.3.

       "MARKS" is defined in Section 3.21.

       "MERGER" is defined in the Recitals of this Agreement.
       
       "MERGER CONSIDERATION" is defined in Section 2.3.

       "NET WORKING CAPITAL" means DigiCourse's (a) Cash, plus Trade Receivables
(Net), plus Other Receivables, plus Other Current Assets, plus Inventories;
reduced by (b) Accounts Payable Trade, plus Other Accrued Liabilities (exclusive
of the liabilities listed in Section 2.6).

       "NYSE" means The New York Stock Exchange Inc.


                                       5
<PAGE>

       "OCCUPATIONAL SAFETY AND HEALTH LAW" means any Legal Requirement designed
to provide safe and healthful working conditions and to reduce occupational
safety and health hazards.

       "ORDER" means any award, decision, injunction, judgment, order, ruling,
subpoena, or verdict entered, issued, made, or rendered by any court,
administrative agency, or other Governmental Body or, if binding, by any
arbitrator.

       "ORDINARY COURSE OF BUSINESS" means an action taken by a Person if such
action is both consistent with the past practices of such Person and is taken in
the ordinary course of the normal day-to-day operations of such Person; and such
action is similar in nature and magnitude to actions customarily taken in the
ordinary course of the normal day-to-day operations of other Persons that are
similar in size and operations to the Person in question.

       "ORGANIZATIONAL DOCUMENTS" means (a) the articles or certificate of
incorporation and the bylaws of a corporation; (b) any charter or similar
document adopted or filed in connection with the creation, formation, or
organization of a Person; and (c) any amendment to any of the foregoing.

       "PATENTS" is defined in Section 3.21.

       "PAYMENT DATE" is defined in Section 2.5.

       "PERSON" means any individual, corporation (including any non-profit
corporation), general or limited partnership, limited liability company, joint
venture, estate, trust, association, organization, labor union, or other entity
or Governmental Body.

       "PLAN" or "PLANS" has the same meaning as defined in Section 3.13.

       "PRIVATE PLACEMENT MEMORANDUM" means that certain private placement
memorandum, including all attachments, of I/O, dated September 30, 1998,
delivered to Stockholder.

       "PROCEEDING" means any action, binding arbitration, audit, hearing,
formal investigation, litigation, or suit (whether civil, criminal or
administrative) commenced, brought, conducted, or heard by or before any
Governmental Body or arbitrator.
       
       "PRODUCTS" means the devices and related Software manufactured and/or
assembled and marketed by DigiCourse and Limited.

       "PROPRIETARY RIGHTS AGREEMENT" is defined in Section 3.20.

       "REASONABLE EFFORTS" means the commercially reasonable efforts that a
prudent Person desirous of achieving a result would use and expend in similar
circumstances to 


                                       6
<PAGE>

undertake reasonably to ensure that such result is achieved expeditiously.

       "REGISTRATION RIGHTS AGREEMENT" is defined in Section 2.4.

       "RELEASE" is defined in Section 2.4.  

       "REPRESENTATIVE" with respect to a particular Person, means any director,
officer, employee, agent, consultant, advisor, or other representative of such
Person with respect to a particular matter, including legal counsel,
accountants, and financial advisors with respect to a particular matter.

       "RIGHTS" means the intellectual property and contract rights, related to
the Products, which are owned or licensed by DigiCourse or Limited in the
development, support, marketing, production, licensing or sale of the Products;
and all Intellectual Property Assets owned or licensed by DigiCourse or Limited
in connection with DigiCourse's or Limited's business.  "RIGHTS" does not
include any of the Shared Software and Rights or any of the foregoing used as a
shared service described on Exhibit 2.7, with Stockholder or any Stockholder
Affiliate.

       "SEC" means the United States Securities and Exchange Commission.

       "SECURITIES ACT" means the Securities Act of 1933 or any successor law,
and regulations and rules issued pursuant to that Act or any successor law.

       "SHARES" means the 1,080,000 shares, no par value per share, of
DigiCourse common stock constituting all of the issued and outstanding capital
stock of DigiCourse.

       "SHARED SOFTWARE AND RIGHTS" is defined in Section 2.12.  

       "SOFTWARE" means all computer programs, including firmware acquired by
DigiCourse (and whether written or created for DigiCourse by any present or
former consultant or employee of DigiCourse or otherwise commissioned by
DigiCourse), or licensed for sublicensing by DigiCourse, together with any
modifications, enhancements, additions or replacements.  "SOFTWARE" does not
include Shared Software and Rights or any of the foregoing used as a shared
service described on Exhibit 2.7, with Stockholder or any Stockholder
Affiliates.

       "STOCKHOLDER" is defined in the Recitals of this Agreement.

       "STOCKHOLDER AFFILIATE" means Affiliates of Stockholder but excludes
DigiCourse and Limited.

       "STOCKHOLDER INDEMNIFIED PERSON" is defined in Section 8.3.

       "SUBSIDIARY" with respect to any specified Person, means any corporation
or other Person of which securities or other interests having the power to elect
a majority of that 


                                       7
<PAGE>

corporation's or other Person's board of directors or similar governing body, 
or otherwise having the power to direct the business and policies of that 
corporation or other Person (other than securities or other interests having 
such power only upon the happening of a contingency that has not occurred) 
are held by the specified Person or one or more of its subsidiaries.

       "SURVIVING CORPORATION" means DigiCourse, as survivor of the Merger.

       "TAX" or "TAXES" mean any federal, state, local or foreign income, sales,
real or personal property or other taxes, assessments, levies, imposts, duties,
or other charges of any nature whatsoever commonly referred to as a "tax"
(including without limitation interest and penalties) imposed by any law, rule
or regulation. 

       "TAX RETURN" means any return (including any information return), report,
statement, schedule, notice, form, or other document or information submitted to
any Governmental Body in connection with the determination, assessment,
collection, or payment of any Tax.

       "THREATENED" means a claim, Proceeding, dispute, action, or other matter
will be deemed to have been "Threatened" if any written demand or statement has
been received or any written notice has been received or any Known action has
been taken by a Claimant that would lead a prudent Person having that Knowledge
to conclude that such a claim, Proceeding, dispute, action, or other matter will
be asserted, commenced, taken, or otherwise pursued in the future against a
specified Person.

       "TRADE SECRETS" is defined in Section 3.21.
       
       "TRANSFER PLAN" is defined in Exhibit 2.11.

2.     THE MERGER

       2.1    EFFECTIVE TIME OF THE MERGER.  Subject to the provisions of this
Agreement, the certificate of merger in the form of EXHIBIT 2.1 (the
"Certificate of Merger") shall be executed and acknowledged as required by the
LBCL and delivered to the Office of the Secretary of State of the State of
Louisiana for filing, pre-positioned in New Orleans for immediate filing, and
then filed as soon as practicable on or after the Closing Date.  The Merger
shall become effective upon the filing of the Certificate of Merger with the
Secretary of State of the State of Louisiana or at such time thereafter as is
provided in the Certificate of Merger (the "Effective Time").

       2.2    EFFECTS OF THE MERGER.   

       (a)    At the Effective Time, the separate existence of I/O Marine shall
cease, and I/O Marine shall be merged with and into DigiCourse (DigiCourse and
I/O Marine are sometimes referred to herein as the "Constituent Corporations");
the Articles of Incorporation of  DigiCourse as in effect immediately prior to
the Effective Time shall be amended and restated in the Certificate of Merger
and shall be the Articles of Incorporation of the Surviving 


                                       8
<PAGE>

Corporation until thereafter amended; the Bylaws of DigiCourse shall be 
amended and restated immediately prior to the Effective Time and shall be the 
Bylaws of the Surviving Corporation until thereafter amended; the duly 
elected and incumbent Board of Directors of I/O Marine as constituted 
immediately prior to the Effective Time shall be the Board of Directors of 
the Surviving Corporation, and shall serve until their successors are duly 
elected and qualified; and the duly elected and incumbent officers of I/O 
Marine as in office immediately prior to the Effective Time shall be the 
officers of the Surviving Corporation, and shall serve until the Board of 
Directors of Surviving Corporation takes action in respect of such service.

        (b)   At and after the Effective Time, the Surviving Corporation shall
possess all the rights, privileges, powers and franchises, whether of a public
or a private nature, and be subject to all the restrictions, disabilities and
duties, of each of the Constituent Corporations; and all of the rights,
privileges, powers and franchises of each of the Constituent Corporations, and
all property, real, personal and mixed, and all debts due to either of the
Constituent Corporations on whatever account, shall be vested in the Surviving
Corporation and all contractual rights, property, rights, privileges, powers and
franchises, and all and every other interest shall thereafter be the property of
the Surviving Corporation as they were of the respective Constituent
Corporations, and the title to any real estate vested by deed or otherwise in
either of the Constituent Corporations shall not revert or be in any way
impaired; but all rights of creditors and all liens upon any property of either
of the Constituent Corporations shall be preserved unimpaired, and all debts,
liabilities and duties of the respective Constituent Corporations shall
thenceforth attach to the Surviving Corporation, and may be enforced against it
to the same extent as if said debts and liabilities had been incurred or
contracted by it.

       2.3    SHARE CONVERSIONS.  At the Effective Time, by virtue of the Merger
and without any action on the part of the holder of any of the Shares of
DigiCourse:

       (a)    COMMON STOCK OF I/O MARINE.  The Merger will automatically convert
each share of common stock of I/O Marine into one share of common stock of
DigiCourse.

       (b)    CONVERSION OF THE SHARES.  The Shares shall be converted into the
right to receive from the Surviving Corporation in exchange for said Shares a
total of 5,794,000 fully paid and non-assessable shares of I/O Common Stock (the
"Merger Consideration").   At the Effective Time, each of the Shares, when so
converted, shall no longer be deemed to be outstanding and shall automatically
be canceled and retired and shall cease to exist, and the holder of a
certificate representing any such Shares shall cease to have any rights with
respect thereto, except the Merger Consideration, upon the surrender of such
certificate, without interest.  

       2.4    CLOSING.  The closing of the Contemplated Transactions (the
"Closing") provided for in this Agreement will take place at the offices of
Haynes and Boone, L.L.P., 1000 Louisiana, Suite 4300, Houston, Texas 77002, upon
such time and date as the parties may agree; or, if they cannot or have not
agreed, such specified date of which any party shall have notified the others by
notice given at least five business days in advance of the specified date, but
in no event prior 


                                       9
<PAGE>

to (i) consent under the HSR Act, (ii) the expiration of five days after the 
delivery by I/O of the Private Placement Memorandum, (iii) the expiration of 
five days after delivery of the Disclosure Letter by DigiCourse, or (iv) the 
expiration of two days after the delivery of any supplement to the Disclosure 
Letter.  Either I/O or DigiCourse (or on occasion each) may delay the Closing 
Date up to and including November 30, 1998, if necessary to permit conditions 
to become satisfied that are not satisfied at the time such delay is 
effected.  At the Closing:

       (a)    Stockholder will deliver to I/O:

              (i)    an investment letter in the form of EXHIBIT 2.4(a)(i)
       executed by the Stockholder ("Investment Letter");
              
              (ii)   the certificates representing the Shares, with appropriate
       stock powers duly executed by Stockholder and signatures Medallion
       guaranteed;

              (iii)  the Registration Rights Agreement ("Registration Rights
       Agreement") in the form of the attached Exhibit 2.4(a)(iii), executed
       by the Stockholder;

              (iv)   the Non-Competition Agreement ("Non-Competition Agreement")
       in the form of the attached Exhibit 2.4(a)(iv) executed by Stockholder;
       and 

              (v)    the Stockholder's Release in the form of the attached
       Exhibit 2.4(a)(v) executed by Stockholder (the "Release').

       (b)    I/O and/or I/O Marine will deliver to Stockholder:

              (i)    certificates for the shares of I/O Common Stock properly
       signed by those Representatives of I/O whose signatures are required for
       the validity of the Merger Consideration constituting the Merger
       Consideration, registered in the name of the Stockholder;
              
              (ii)   the Registration Rights Agreement executed by I/O; and
              
              (iii)  the Non-Competition Agreement executed by I/O.

       2.5    DETERMINATION OF ECONOMIC CLOSING NET WORKING CAPITAL.  During the
sixty (60) days following the Economic Closing Date, KPMG will determine Net
Working Capital of DigiCourse as of the Economic Closing Date ("Economic Closing
Net Working Capital").  Economic Closing Net Working Capital will be
determined by KPMG, the outside accountants of all parties, applying the
accounting procedures in the attached Exhibit 1.  The parties stipulate that the
component of Inventory acquired from Syntron has a fair market value of
$1,525,000 for financial accounting purposes.  "Excess Net Working Capital"
shall exist if, and to the extent that, Economic Closing Net Working Capital is
greater than $11,500,000 ("Base 


                                      10

<PAGE>

Amount").  "Deficit Net Working Capital" shall exist if, and to the extent 
     that, Economic Closing Net Working Capital is less than Base Amount.

       (a)    In the event there is Excess Net Working Capital:

              (i)    The Surviving Corporation shall, to the extent of the
       Excess Net Working Capital, pay to the Stockholder an amount equal to the
       liabilities identified in Section 2.6(b) by the date ("Payment Date")
       that is five business days after the determination of Economic Closing
       Net Working Capital.  I/O shall, in accordance with this Agreement,
       transfer to the Surviving Corporation an amount of cash equal to, and to
       be used to pay, the liabilities identified in Section 2.6(b) in
       accordance with the previous sentence.   

              (ii)   To the extent said Excess Net Working Capital exceeds the
       liabilities identified in Section 2.6(b), I/O shall, in accordance with
       this Agreement transfer to the Surviving Corporation to pay to the
       Stockholder by the Payment Date as additional consideration an amount of
       cash, equal to the Excess Net Working Capital less the liabilities
       identified in Section 2.6(b) paid pursuant to Section 2.5(a)(i).

              (iii)  If the liabilities identified in Section 2.6(b) exceed the
       Excess Net Working Capital, then to the extent of such excess,
       Stockholder will be deemed, as a capital contribution, to automatically
       assume on the Payment Date and agree to pay, perform and discharge when
       due and payable, the liabilities and obligations of DigiCourse identified
       in Section 2.6(b) (after the payment referred to in Section 2.5(a)(i)
       above), whether due and payable or accrued for future payment but only to
       the extent such liabilities exceed Excess Net Working Capital.

       (b)    If there is Deficit Net Working Capital, the Stockholder will, as
a capital contribution, pay to the Surviving Corporation by the Payment Date an
amount equal to said deficit.  Furthermore, Stockholder will be deemed, as a
capital contribution, to automatically assume and agree to pay, perform and
discharge, when due and payable, the liabilities and obligations of DigiCourse
identified in Section 2.6, whether due and payable or accrued for future
payment.

       (c)    Any payment due under this Section 2.5 will be paid by the Payment
Date and shall include interest thereon from the first to occur of (i) 30 days
after the Economic Closing Date or (ii) the Payment Date, through the date of
payment, at a floating rate equal to the prime rate of interest shown from time
to time in the "Money Rates" section of The Wall Street Journal.

       The Net Working Capital adjustment is outside of and is not subject to
any of the limitations set forth in the indemnification provisions of Section 8.

       2.6    LIABILITIES.  For purposes of Section 2.5, the identified
liabilities, whether due and payable or accrued for future payment, are as
follows:


                                      11
<PAGE>

       (a)    all Tax obligations attributable to periods preceding the Economic
Closing Date; and

       (b)    all amounts originally owed to Stockholder or Stockholder
Affiliates (whether assigned after origination) arising on or before the
Economic Closing Date.  

       Surviving Corporation shall be responsible for the liabilities identified
in this Section 2.6 to the extent, and only to the extent, of any Excess Net
Working Capital.  In all other respects, Surviving Corporation and I/O shall
have no obligation or commitment to discharge the obligations identified in this
Section 2.6, and such obligations shall be solely the responsibility of
Stockholder.

       2.7    CONTINUED SERVICES.  Stockholder agrees to provide to the
Surviving Corporation and to Limited, effective from the Economic Closing Date,
the shared support services listed, for the consideration, and for the time,
described, in the agreement attached as Exhibit 2.7.

       2.8    CANCELLATION.  Stockholder, on behalf of itself and Stockholder
Affiliates, agrees upon Closing to cancel all Contracts between DigiCourse and
Limited, on the one hand, and Stockholder and Stockholder Affiliates on the
other hand, except for this Agreement and those agreements entered into pursuant
to this Agreement.
       
       2.9    DIRECTOR.  Immediately following Closing, I/O will elect James M.
Lapeyre, Jr. to the I/O Board of Directors with a term expiring at the I/O
annual stockholder meeting in the calendar year 2000.

       2.10   LEASED FACILITIES.  At the Economic Closing Date, Stockholder
agrees to lease, or to cause the lease of, to Surviving Corporation, certain
facilities historically used by DigiCourse, that are described in Exhibit 2.10,
on the terms and conditions, and for the consideration, provided in the attached
Exhibit 2.10.

       2.11   WORKFORCE.  Transfer of the DigiCourse workforce from
Stockholder's corporate group and benefit regime to I/O's corporate group and
benefit regime will be carried out according to the Transfer Plan, attached as
Exhibit 2.11.  All DigiCourse salary and benefit expenses after the Economic
Closing Date shall be for the account of, and borne by, the Surviving
Corporation. 

       2.12   SHARED SOFTWARE AND RIGHTS.  As used in this Agreement, "Shared
Software and Rights" means all items that constitute Software or Rights as
defined in this Agreement owned or licensed by Stockholder or a Stockholder
Affiliate and shared by DigiCourse or Limited.  Stockholder agrees that, to the
extent it can do so without expense (other than nominal expense) or
inconvenience or reduction of the number of licenses owned by Stockholder or any
Stockholder Affiliate, it will license the Surviving Corporation to use the
Shared 


                                      12
<PAGE>

Software and Rights and, otherwise, will upon request by the Surviving 
Corporation use Reasonable Efforts to assist it in obtaining the necessary 
license to use the Shared Software and Rights.

       2.13   POST ECONOMIC CLOSING.   DigiCourse shall continue to operate
in the Ordinary Course of Business through the Closing.  However, upon Closing,
DigiCourse will be stipulated to have been operated from the Economic Closing
Date through the Closing Date, for the benefit, risk and burden, and at the
expense of, Surviving Corporation.  After the Economic Closing Date, Stockholder
will render the services, lease space and otherwise perform all as set forth in
accordance with the Exhibits attached to this Agreement.  Furthermore,
Stockholder will continue to charge DigiCourse for all services, expenses,
charges and allocations (other than those set forth in the previous sentence) in
accordance with the practice and procedures utilized by Stockholder and
DigiCourse during the preceding twelve (12) month period.  (Included, without
limitation, in said allocations shall be DigiCourse's share of Tax. 
DigiCourse's share of income taxes incurred after the Economic Closing Date
shall be calculated by applying a rate of thirty-four percent (34%) for federal
income tax purposes and a rate of eight percent (8%) for state income tax
purposes to net income incurred by DigiCourse after the Economic Closing Date.) 
Said services, expenses, charges and allocations shall be reflected in an
intercompany account as a debt owed by DigiCourse to Stockholder.  Surviving
Corporation shall be responsible to pay and shall assume (i) any DigiCourse
intercompany debt incurred after the Economic Closing Date, and (ii) any other
debt or charge either (a) incurred by Stockholder for the account of DigiCourse
after the Economic Closing Date or (b) incurred by DigiCourse after the Economic
Closing Date.  Promptly following Closing, Surviving Corporation shall reimburse
Stockholder for all of the foregoing incurred by or for the benefit of
DigiCourse after the Economic Closing Date.  Except as set forth above,
Surviving Corporation shall retain all DigiCourse revenues received after the
Economic Closing Date and prior to Closing.

3.     REPRESENTATIONS AND WARRANTIES OF STOCKHOLDER AND DIGICOURSE

       Stockholder, but only with respect to Section 3.1 below as it relates to
Stockholder, and DigiCourse, with respect to all other matters in this Article
3, represent and warrant to I/O, except as set forth in the Disclosure Letter,
as follows:

       3.1    AUTHORITY; NO CONFLICT.

       (a)    This Agreement constitutes the legal, valid, and binding
obligation of DigiCourse and the Stockholder, enforceable against DigiCourse and
the Stockholder in accordance with its terms. 

       (b)    Neither the execution and delivery of this Agreement nor the
consummation or performance of any of the Contemplated Transactions will,
directly or indirectly (with or without notice or lapse of time):


                                      13
<PAGE>

              (i)    contravene, conflict with, or result in a violation of
       (A) any provision of the Organizational Documents of DigiCourse, or
       (B) any resolution adopted by the board of directors or the Stockholder
       of DigiCourse;

              (ii)   contravene, conflict with, or result in a violation of any
       Order to which DigiCourse or Stockholder, or any of the assets owned or
       used by DigiCourse, may be subject;
       
              (iii)  contravene, conflict with, or result in a violation or
       breach of any provision of, or give any Person the right to declare a
       default or exercise any remedy under, or to accelerate the maturity or
       performance of, or to cancel, terminate, or modify, any Applicable
       Contract over $60,000 in any twelve (12) month period; or
       
              (iv)   result in the imposition or creation, pursuant to an
       Applicable Contract over $60,000 in any twelve (12) month period, of any
       Encumbrance upon or with respect to any of the assets owned or used by
       DigiCourse.
       
       Except for satisfaction of HSR requirements, DigiCourse and Stockholder
are not required to give any notice to or obtain any Consent from any Person in
connection with the execution and delivery of this Agreement or the consummation
or performance of any of the Contemplated Transactions.
       
       (c)    Stockholder is acquiring the shares of I/O Common Stock for its
own account and not with a view to their distribution within the meaning of
Section 2(11) of the Securities Act. Prior to the date of this Agreement, the
Stockholder has received a copy of the Private Placement Memorandum and has had
an adequate opportunity to review and understand the Private Placement
Memorandum, and to ask questions of and receive answers from I/O and I/O Marine.
       
       (d)    The Stockholder is, and on the Closing Date will be, the record
and beneficial owner and holder of all of the Shares, free and clear of all
Encumbrances. 
       
       3.2    ORGANIZATION AND GOOD STANDING.  DigiCourse is a corporation duly
organized, validly existing, and in good standing under the laws of the State of
Louisiana, with full corporate power and authority to conduct its business as it
is now being conducted, to own or use the properties and assets that it 
purports to own or use, and to perform all its obligations under Applicable 
Contracts.  Part 3.2 of the Disclosure Letter contains an accurate list of 
the other jurisdictions in which DigiCourse is authorized to transact 
business.  DigiCourse is duly qualified to transact business as a foreign 
corporation and is in good standing under the laws of each state or other 
jurisdiction in which failure to qualify or be in good standing could have a 
material adverse effect on DigiCourse.
       
       3.3    CAPITALIZATION.  The authorized equity securities of DigiCourse
consist of 2,500,000 shares of common stock, no par value, of which 1,080,000
shares are issued and 


                                      14
<PAGE>

outstanding and constitute the Shares. All of the outstanding equity 
securities of DigiCourse have been duly authorized and validly issued and are 
fully paid and nonassessable. Except for this Agreement, there is no Contract 
relating to the issuance, sale, or transfer of any equity securities or other 
securities of DigiCourse. The outstanding equity securities or other 
securities of DigiCourse were issued in compliance with all Legal 
Requirements.  At Closing, DigiCourse will own beneficially and of record all 
equity interests in Limited.  DigiCourse Limited, a United Kingdom 
corporation ("Limited"), is beneficially owned 100% by DigiCourse even though 
Stockholder is the record owner of one-half of Limited.  However, pursuant to 
a Declaration of Nomineeship dated May 18, 1992, Stockholder declared that 
it holds a 50% interest in Limited in Trust for the benefit of DigiCourse all 
in accordance with said declaration.  At or prior to Closing, Stockholder 
will execute any and all documents required to establish that DigiCourse owns 
100% of Limited. Limited is a company duly organized, validly existing and in 
good standing under the laws of United Kingdom with full corporate power and 
authority to conduct its business as it is now being conducted, to own or use 
the properties and assets that it purports to own or use and to perform all 
its obligations under Applicable Contracts.  DigiCourse does not own, nor 
does it have any Contract to acquire, any other equity securities or other 
securities of any Person or any direct or indirect equity or ownership 
interest in any other business and is not a party to any joint venture, 
teaming agreement, partnership or similar entity or enterprise. Except as 
stated above, there are no preemptive or other outstanding rights, options, 
warrants, conversion rights, stock appreciation rights, redemption rights, 
repurchase rights, agreements, arrangements or commitments to issue or to 
sell any shares of capital stock or other securities of Limited or any of its 
subsidiaries or any securities or obligations convertible or exchangeable 
into or exercisable for, or giving any Person a right to subscribe for or 
acquire, any securities of Limited and no securities or obligation evidencing 
such rights are authorized, issued or outstanding. Limited does not have 
outstanding any bonds, debentures, notes or other obligations the holders of 
which have the right to vote (or convertible into or exercisable for 
securities having the right to vote) with the stockholder of Limited on any 
matter.
       
       3.4    FINANCIAL STATEMENTS.  DigiCourse has delivered to I/O and will
attach to the Disclosure Letter: (a) unaudited financial statements consisting
of statements of assets, liabilities and stockholder's equity of DigiCourse as
of March 31 for each of the years 1994 through 1998, and the related unaudited
statement of revenues and expenses, and cash flow, for each of the fiscal years
then ended, (b) an unaudited balance sheet of DigiCourse as of June 30, 1998
(the "Balance Sheet"), and the related unaudited statement of income for the
three months then ended, (c) an unaudited balance sheet of DigiCourse as of
August 31, 1998 and an unaudited balance sheet of Limited as of August 31, 1998
(together, the "Interim Balance Sheets") and the related unaudited statements of
income for the five months then ended for DigiCourse and Limited and (d) audited
financial statements for the three past fiscal years of Limited.  Such financial
statements substantially and fairly present the financial condition and the
results of operations of DigiCourse and Limited as at the respective dates of
and for the periods referred to in such financial statements, reflecting the
consistent application of accounting principles, in accordance with GAAP,
except, in the case of unaudited financial statements, for the absence of
footnote disclosures throughout the periods involved, and subject 


                                      15
<PAGE>

to audit adjustments that either would not have been material in amount or 
would involve intercompany accounts and charges.  The Interim Balance Sheets 
reflect appropriate reserves to satisfy the warranty obligations of 
DigiCourse and Limited in accordance with GAAP.
       
       3.5    BOOKS AND RECORDS.  The books of account, minute books, stock
record books, and other records of DigiCourse and Limited, all of which have
been made available to I/O, to DigiCourse's Knowledge are complete and correct
and have been maintained in accordance with sound business practices, including
the maintenance of an adequate system of internal controls. The minute books of
DigiCourse and Limited contain accurate and complete records of all meetings
held of, and corporate actions taken by, the Stockholder in its capacity as a
shareholder, the Boards of Directors of DigiCourse and Limited, and committees
of the Boards of Directors of DigiCourse and Limited, respectively.  At the
Closing, all books and records of DigiCourse and Limited since January 1, 1992,
and all minute books and stock records, will be in the possession of DigiCourse.
Stockholder will promptly deliver to the Surviving Corporation those DigiCourse
or Limited records that Stockholder subsequently discovers in archive. 
Stockholder shall have the right to retain a copy of these books and records.
       
       3.6    TITLE TO PROPERTIES; ENCUMBRANCES.
       
        (a)   Part 3.6 of the Disclosure Letter contains a complete and accurate
list of all real property leaseholds of DigiCourse or Limited.  DigiCourse and
Limited own all the properties and assets (whether real, personal, or mixed and
whether tangible or intangible) reflected in the Interim Balance Sheets (except
for assets held under capitalized leases disclosed, or not required to be
disclosed, in Part 3.6 of the Disclosure Letter and personal property sold since
the date of the Interim Balance Sheets, as the case may be, in the Ordinary
Course of Business), and all of the properties and assets purchased or otherwise
acquired by DigiCourse or Limited since the date of the Interim Balance Sheets
(except for personal property acquired and sold since the date of the Interim
Balance Sheets in the Ordinary Course of Business).
 
        (b)   Except as disclosed on Part 3.6 of the Disclosure Letter, all
material properties and assets reflected in the Interim Balance Sheets are free
and clear of all Encumbrances and are not subject to any building use
restrictions, exceptions, variances, reservations, or limitations of any nature
(collectively, "Limitations") except, with respect to all such properties and
assets, (i) security interests shown on the Interim Balance Sheets with respect
to which no default (or event that, with notice or lapse of time or both, would
constitute a default) exists, (ii) security interests incurred in connection
with the purchase of property or assets after the date of the Interim Balance
Sheets (such security interests being limited to the property or assets so
acquired), with respect to which no default (or event that, with notice or lapse
of time or both, would constitute a default) exists, (iii) liens for current
Taxes not yet due, or Encumbrances that are not material to DigiCourse or
Limited and (iv) Encumbrances and Limitations on real property that do not
materially interfere with DigiCourse's or Limited's use of such real property.
 
       3.7    CONDITION AND SUFFICIENCY OF ASSETS.  The leasehold structures and
equipment 


                                      16
<PAGE>

of DigiCourse and Limited are adequate for the uses to which they are being 
put.  None of such structures or equipment is in need of maintenance or 
repairs except for ordinary, routine maintenance.  The leasehold structures 
and equipment of DigiCourse and Limited are sufficient leasehold structures 
and equipment for the continued conduct of DigiCourse's and Limited's 
business immediately after the Economic Closing Date in substantially the 
same manner as conducted immediately prior to the Economic Closing Date.
 
       3.8    ACCOUNTS RECEIVABLE.  All accounts receivable of DigiCourse and
Limited that are reflected on the Interim Balance Sheets or on the accounting
records of DigiCourse or Limited as of the Economic Closing Date (collectively,
the "Accounts Receivable") represent or will represent valid obligations arising
from sales actually made or services actually performed in the Ordinary Course
of Business.  To DigiCourse's Knowledge, unless paid prior to the Economic
Closing Date, the Accounts Receivable are or will be as of the Economic Closing
Date current and collectible net of the respective reserves shown on the Interim
Balance Sheets or on the accounting records of DigiCourse and Limited as of the
Economic Closing Date (which reserves are adequate and calculated consistent
with past practice).  There is no contest, claim, or right of set-off, other
than returns in the Ordinary Course of Business, under any Contract with any
obligor of an Accounts Receivable relating to the amount or validity of such
Accounts Receivable. Part 3.8 of the Disclosure Letter contains a complete and
accurate aged list of all Accounts Receivable as of the date of the Interim
Balance Sheets, which list sets forth the aging of such Accounts Receivable.
 
       3.9    INVENTORY.  All inventory of DigiCourse and Limited reflected in
the Interim Balance Sheets consists, and reflected on the accounting records at
the Economic Closing Date will consist of, a quality and quantity usable and
salable in the Ordinary Course of Business, except for obsolete items and items
of below-standard quality, all of which have been written off or written down to
net realizable value in the Interim Balance Sheets.  To DigiCourse's Knowledge,
the quantities of inventory are reasonable in the present circumstances of
DigiCourse and Limited. 
 
       3.10   NO UNDISCLOSED LIABILITIES. DigiCourse and Limited have no
material liabilities or obligations of any nature (whether known or unknown and
whether absolute, accrued, contingent, or otherwise) except for liabilities or
obligations reflected or reserved against in the Interim Balance Sheets,
liabilities incurred in the Ordinary Course of Business since the date of the
Interim Balance Sheets and liabilities not required to be reflected or reserved
against under GAAP.
 
       3.11   TAXES.  DigiCourse and Limited have each filed or caused to be
filed all Tax Returns that are or were required to be filed by or with respect
to them pursuant to applicable Legal Requirements.  DigiCourse and Limited have
paid, or made provision for the payment of, all Taxes that have or may have
become due pursuant to those Tax Returns.  The charges, accruals, and reserves
with respect to Taxes on the books of DigiCourse are adequate under applicable
Legal Requirements of taxing authorities and are at least equal to the liability
for Taxes as determined under such Legal Requirements.  All Taxes that each of
DigiCourse and 


                                      17
<PAGE>

Limited is or was required by Legal Requirements to withhold or collect have 
been duly withheld or collected and, to the extent required, have been paid 
to the proper Governmental Body or other Person. All Tax Returns filed on a 
consolidated basis on behalf of DigiCourse are true, correct, and complete in 
all material respects.  There is no Tax sharing agreement that will require 
any payment by DigiCourse or Limited after the date of this Agreement.
 
       3.12   NO MATERIAL ADVERSE CHANGE.  Since the date of the Interim Balance
Sheets, there has not been any material adverse change in the business,
operations, properties, assets, or financial condition of DigiCourse or Limited
through the date of this Agreement, and no event has occurred or circumstance
exists through the date of this Agreement that may result in such a material
adverse change other than those generally affecting DigiCourse's industry.
 
       3.13   EMPLOYEE PLANS AND AGREEMENTS.  Part 3.13 of the Disclosure Letter
lists all of the profit sharing plans and all of the retirement, stock option,
stock purchase, bonus, life, medical, vision, health, disability or accident
plans, deferred compensation plans, severance agreements, and other employee
compensation or benefit plans, agreements and arrangements, including, without
limitation, all "plans" as defined in Section 3(3) of ERISA, relating to
officers or employees (including former officers or employees) of DigiCourse or
Limited pursuant to which DigiCourse or Limited has any liability (contingent or
otherwise) (collectively, the "Plans" and individually, a "Plan"). DigiCourse
and Limited have complied with all Legal Requirements governing, and terms and
conditions of, the Plans.  Since April 1, 1998, DigiCourse has maintained
workers' compensation coverage as required by applicable state law through
purchase of insurance and not by self-insurance, and DigiCourse has no
liabilities for prior workers' compensation self-insurance.
 
       3.14   COMPLIANCE WITH LEGAL REQUIREMENTS; GOVERNMENTAL AUTHORIZATIONS.
To the Knowledge of DigiCourse, DigiCourse and Limited are, and at all times
since January 1, 1994 have been, in full compliance with each Legal Requirement
that is or was applicable to them or to the conduct or operation of their
business or the ownership or use of any of their assets that could have material
Adverse Consequences to DigiCourse or Limited; and to the Knowledge of
DigiCourse, no event has occurred or circumstance exists that (with or without
notice or lapse of time) constitutes a material violation by DigiCourse or
Limited of, or a material failure on the part of DigiCourse or Limited to comply
with, any Legal Requirement.  To DigiCourse's Knowledge, Part 3.14 of the
Disclosure Letter contains a complete and accurate list of each license or
permit from a Governmental Body that is held by DigiCourse or Limited the
absence of which would have a material Adverse Consequence to DigiCourse or
Limited.

       3.15   LEGAL PROCEEDINGS; ORDERS.  Except as set forth in Part 3.15 of
the Disclosure Letter, there is no pending Proceeding:

       (a)    that has been commenced by or against DigiCourse or Limited or
that involves claims against or by DigiCourse or Limited; or


                                      18
<PAGE>

       (b)    that challenges, or that may have the effect of preventing,
delaying, making illegal, or otherwise interfering with, any of the Contemplated
Transactions.

To the Knowledge of DigiCourse, no such Proceeding has been Threatened. 

       3.16   ABSENCE OF CERTAIN CHANGES AND EVENTS.  Since the date of the
Interim Balance Sheets, DigiCourse and Limited have each conducted its business
only in the Ordinary Course of Business, except for this Agreement.

       3.17   CONTRACTS; NO DEFAULTS.  Part 3.17 of the Disclosure Letter
contains an accurate list of each Applicable Contract that involves an amount in
excess of $60,000 in any 12 month period.  Each Contract identified or required
to be identified in Part 3.17 of the Disclosure Letter is in full force and
effect, without breach to DigiCourse's Knowledge, and is valid and enforceable
in accordance with its terms (subject to debtors' protection laws and equitable
principles).

       3.18   INSURANCE.  DigiCourse has delivered to I/O true and complete
copies of all policies of insurance to which DigiCourse or Limited is a party or
under which DigiCourse or Limited, or any officer or director of DigiCourse or
Limited, is or has been covered since March 31, 1996, related to the business of
DigiCourse or Limited.  All policies to which DigiCourse is a party or that
provide coverage to DigiCourse or Limited, or any director or officer of
DigiCourse or Limited related to the business of DigiCourse or Limited are
valid, outstanding, and enforceable; and do not provide for any retrospective
premium adjustment or other experienced-based liability on the part of
DigiCourse or Limited.  Following the Merger, the Surviving Corporation will no
longer be covered by insurance arranged through Stockholder.

       3.19   ENVIRONMENTAL MATTERS. DigiCourse and Limited are, and at all
times have been, in full compliance with, and has not been and is not in
violation of or liable under, any Environmental Law.  Through the Economic
Closing Date there will be no pending or, to the Knowledge of DigiCourse,
Threatened claims resulting from any Environmental, Health, and Safety
Liabilities or arising under or pursuant to any Environmental Law, with respect
to or affecting any of the Facilities or other DigiCourse or Limited operations,
properties and assets.

       3.20   EMPLOYEES.  DigiCourse has delivered to I/O a complete and
accurate list, as of the date of this Agreement, of the following information
for each employee of DigiCourse or Limited, including each employee on leave of
absence or layoff status: name; job title; current compensation paid or payable
and any change in compensation since January 1, 1996; vacation accrued; and
service credited for purposes of vesting and eligibility to participate under
DigiCourse's or Limited's Plans.  To DigiCourse's Knowledge, no employee of
DigiCourse or Limited is a party to, or is otherwise bound by, any agreement or
arrangement, including any confidentiality, noncompetition, or proprietary
rights agreement, between such employee and any other Person ("Proprietary
Rights Agreement") that in any way adversely affects or will affect the
performance of his duties as an employee of DigiCourse or Limited.  To
DigiCourse's Knowledge, on the date of this Agreement and on the Economic
Closing Date, no officer, or 


                                      19
<PAGE>

employee directly reporting to an officer, or other employee with an annual 
base compensation of $50,000 per year, of DigiCourse or Limited intends to 
terminate his employment with DigiCourse or Limited.

       3.21   INTELLECTUAL PROPERTY.   

       (a)    INTELLECTUAL PROPERTY ASSETS.  The term "Intellectual Property
Assets" includes DigiCourse's and Limited's:

              (i)    name, and any fictional business names, trading names,
       registered and unregistered trademarks, service marks, and trademarks or
       service mark applications listed in Part 3.21(a)(i) of the Disclosure
       Letter (collectively, "Marks");

              (ii)   those patents, patent applications, and inventions and
       discoveries that may be patentable listed in Part 3.21(a)(i) of the
       Disclosure Letter (collectively, "Patents");

              (iii)  all copyrights in both material published works and
       material unpublished works (collectively, "Copyrights");

              (iv)   all know-how, trade secrets, confidential information,
       customer lists, technical information, data, process technology, plans,
       drawings, and blue prints that have been protected (collectively, "Trade
       Secrets") or are owned or licensed by DigiCourse or Limited as licensee
       or licensor; and

              (v)    all material Software and Rights owned or licensed by
       DigiCourse or Limited as licensee or licensor.

       (b)    AGREEMENTS.  Part 3.21(b) of the Disclosure Letter contains a
complete and accurate list of all Contracts relating to the Intellectual
Property Assets to which DigiCourse or Limited is a party or by which DigiCourse
or Limited is bound, except for (i) any perpetual license implied by the sale of
a product and (ii) each paid-up license for commonly available software programs
with a value of less than $50,000 under which DigiCourse is the licensee. There
are no outstanding and, to DigiCourse's Knowledge, no Threatened disputes or
disagreements with respect to any listed Contract.  DigiCourse and Stockholder
have not granted and are not obligated to grant a license, assignment or other
right in respect of any item of Intellectual Property Assets, except as
disclosed on Part 3.21(b) to the Disclosure Letter.

       (c)    KNOW-HOW NECESSARY FOR THE BUSINESS.

              (i)    The Intellectual Property Assets are all those necessary
       for the operation of DigiCourse's businesses as they are currently
       conducted other than Intellectual Property Assets that are Shared
       Software and Rights or that are used as a shared service described on
       Exhibit 2.7 with Stockholder or Stockholder Affiliates.  DigiCourse is
       the 


                                      20

<PAGE>

       owner or licensee of all right, title, and interest in and to each of
       the Intellectual Property Assets, free and clear of all liens, security
       interests, charges, encumbrances, equities, and other adverse claims, and
       has the right to use without payment to a third party all of the
       Intellectual Property Assets, unless listed in Part 3.21(c)(i) of the
       Disclosure Letter.

              (ii)   No past or present employee or consultant of DigiCourse has
       any ownership interest or any other rights in and to any Intellectual
       Property Asset.  No Contract exists between DigiCourse and any third
       party which would impede or prevent the continued use of such right,
       title and interest of DigiCourse in and to the Intellectual Property
       Assets as DigiCourse had prior to the Economic Closing Date and used in
       the conduct of its business, subject to the rights of licensors and
       licensees pursuant to existing Contracts listed on Part 3.21(b) to the
       Disclosure Letter.

       (d)    PATENTS.

              (i)    Part 3.21(a)(ii) of the Disclosure Letter contains a
       complete and accurate list of all issued Patents.  At the time of the
       Economic Closing Date, DigiCourse will be the owner of all right, title,
       and interest in and to each of the issued Patents, free and clear of any
       Encumbrances, and Stockholder will take steps in an orderly and prompt
       fashion to transfer ownership of record to all issued foreign Patents to
       Surviving Corporation.

              (ii)   All of the issued U.S. Patents are currently in compliance
       with formal legal requirements (including payment of filing, examination,
       and maintenance fees).

              (iii)  To DigiCourse's Knowledge, no issued Patent is involved in
       any interference, reissue, reexamination, or opposition proceeding.  To
       DigiCourse's Knowledge, there is no interfering patent or patent
       application of any third party to any issued Patent.

              (iv)   To DigiCourse's Knowledge, no issued Patent has been
       Threatened.  To DigiCourse's Knowledge, none of the Products infringes or
       is alleged to infringe any patent or other proprietary right of any other
       Person.

       (e)    MARKS.

              (i)    Part 3.21(e) of Disclosure Letter contains a complete and
       accurate list of all registered Marks.  At the time of the Economic
       Closing Date, DigiCourse will be the owner of all right, title, and
       interest in and to each of the U.S. Marks, free and clear of all
       Encumbrances and Stockholder will take steps in an orderly and timely
       fashion to transfer ownership of record to all registered foreign Marks.

              (ii)   All Marks that have been registered with the United States
       Patent and 

                                       21
<PAGE>

       Trademark Office are currently in compliance with all formal legal 
       requirements (including the timely post-registration filing of
       affidavits of use and incontestability and renewal applications).

              (iii)  To DigiCourse's Knowledge, no registered Mark or pending
       trademark application is now involved in any opposition, invalidation, or
       cancellation.

       (f)    COPYRIGHTS.

              (i)    Part 3.21(f) of the Disclosure Letter contains a complete
       and accurate list of all registered Copyrights.  DigiCourse is the owner
       of all right, title, and interest in and to each of the registered
       Copyrights, free and clear of all Encumbrances.

              (ii)   All registered Copyrights are currently in compliance with
       formal legal requirements.

              (iii)  To DigiCourse's Knowledge, no Copyright is infringed or
       Threatened.

       (g)    TRADE SECRETS.   To DigiCourse's Knowledge, with respect to
material Trade Secrets, the documentation relating to such Trade Secret is
reasonably current and sufficient in detail and content to identify and explain
it and to allow its full and proper use without reliance on the knowledge or
memory of any single individual.

       (h)    RIGHTS.

              (i)    Part 3.21(h) of the Disclosure Letter contains a complete
       and accurate list of all Products.  DigiCourse is the owner of all right,
       title, and interest in and to the Rights, free and clear of all
       Encumbrances and the Rights may be used by the Surviving Corporation to
       produce and market all of the Products following the Economic Closing
       Date in the same manner as such were used prior to the Economic Closing
       Date without the payment of additional fees.

              (ii)   To DigiCourse's Knowledge, the Products perform in all
       material respects in accordance with the Documentation.

              (iii)  DigiCourse will have delivered to I/O in written form, and
       scheduled in the Disclosure Letter, all material Products (A) that are
       non-standard Products under development for a particular customer, (b)
       that require non-standard support, (C) that have a non-standard warranty,
       and (D) that have non-standard delivery obligations.  To DigiCourse's
       Knowledge, neither DigiCourse nor Limited has requested additional
       equipment, development tools or technical personnel indicating that they
       are needed to satisfy and discharge these obligations.

                                       22
<PAGE>

              (iv)   DigiCourse has made available to I/O and I/O Marine
       documentation identifying, to DigiCourse's Knowledge, all bugs in
       Products together with documentation of all fixes implemented, in
       development or planned for those bugs.

              (v)    Except for changes to be made in the Ordinary Course of
       Business which will not have material Adverse Consequences on
       DigiCourse's business, to DigiCourse's Knowledge, no currently available
       or announced technological advance or release will result in any
       Product's obsolescence within the next twelve (12) months.

              (vi)   Except as disclosed in writing to I/O, to DigiCourse's
       Knowledge performance of the Products will not be adversely affected in
       any material respect solely as a result of the date change from December
       31, 1999 to January 1, 2000.

       3.22   DISCLOSURE.  To DigiCourse's Knowledge, no representation or 
warranty of Stockholder in this Agreement and no statement in the Disclosure 
Letter omits to state a material fact necessary to make the statements herein 
or therein, in light of the circumstances in which they were made, not 
misleading.

       3.23   BROKERS OR FINDERS.  DigiCourse and Limited have incurred no 
obligation or liability, contingent or otherwise, for brokerage or finders' 
fees or agents' commissions or other similar payment in connection with this 
Agreement.

       3.24   YEAR 2000 COMPLIANCE.  Part 3.24 of the Disclosure Letter 
contains DigiCourse's and Limited's Year 2000 action plans and status 
reports. DigiCourse's and Limited's operations as currently conducted, upon 
execution of these Year 2000 action plans, to DigiCourse's Knowledge, will 
not suffer a material Adverse Consequence determined applying the British 
Standards Institute definition of Year 2000 compliant.

4.     REPRESENTATIONS AND WARRANTIES OF I/O

       I/O and I/O Marine jointly and severally represent and warrant to 
Stockholder as follows:

       4.1    ORGANIZATION AND GOOD STANDING.  I/O is a corporation duly 
organized, validly existing, and in good standing under the laws of the State 
of Delaware with full corporate power and authority to conduct its business 
as it is now being conducted, to own and use the properties and assets that 
it purports to own or use and to perform all its obligations under all 
Contracts to which it is a party.  

       4.2    AUTHORITY; NO CONFLICT.

       (a)    This Agreement constitutes the legal, valid, and binding 
obligation of I/O, enforceable against I/O in accordance with its terms.  I/O 
has the absolute and unrestricted right, power, and authority to execute and 
deliver this Agreement and to perform its obligations under this Agreement.

                                       23
<PAGE>

       (b)    Neither the execution and delivery of this Agreement by I/O nor 
the consummation or performance of any of the Contemplated Transactions by 
I/O will, directly or indirectly (with or without notice or the lapse of 
time), contravene, conflict with or result in a violation of:

              (i)    any provision of I/O's Organizational Documents;

              (ii)   any resolution adopted by the board of directors or the
       stockholders of I/O;

              (iii)  any Legal Requirement or Order to which I/O or any of its
       assets may be subject; or

              (iv)   any Contract to which I/O is a party or by which I/O or any
       of its assets may be bound; or result in the imposition or creation of
       any Encumbrance upon or with respect to any of such assets.

Except for satisfaction of HSR requirements and as set forth in Schedule 4.2, 
I/O is not and will not be required to obtain any Consent from any Person in 
connection with the execution and delivery of this Agreement or the 
consummation or performance of any of the Contemplated Transactions.

       4.3    CERTAIN PROCEEDINGS.  There is no pending Proceeding that has 
been commenced against I/O and that challenges, or may have the effect of 
preventing, delaying, making illegal, or otherwise interfering with, any of 
the Contemplated Transactions or that involves material claims not disclosed 
in the I/O SEC Reports against I/O or I/O Affiliates. To I/O's Knowledge, no 
such Proceeding has been Threatened.

       4.4    BROKERS OR FINDERS.  Except for fees payable by I/O to 
Schnitzius & Vaughan, I/O and its officers and agents have incurred no 
obligation or liability, contingent or otherwise, for brokerage or finders' 
fees or agents' commissions or other similar payment in connection with this 
Agreement and will indemnify and hold Stockholder harmless from any such 
payment alleged to be due from Stockholder by or through I/O as a result of 
the action of I/O or its officers or Representatives.  This indemnity is not 
subject to the ceiling or threshold of Section 8.

       4.5    I/O CAPITALIZATION.

       (a)    The authorized capital stock of I/O consists of 100,000,000 
shares of I/O Common Stock, of which 44,586,434 shares were outstanding as of 
the close of business on September 21, 1998, and 5,000,000 shares of 
preferred stock, par value $0.01 per share, of which no shares were 
outstanding as of September 21, 1998.  All of the outstanding shares of I/O 
Common Stock have been duly authorized and are validly issued, fully paid and 
nonassessable.  I/O does not have outstanding any bonds, debentures, notes or 
other obligations the holders of which have 

                                       24
<PAGE>

the right to vote (or, except stock options, convertible into or exercisable 
for securities having the right to vote) with the stockholders of I/O on any 
matter.

       (b)    Prior to the Closing, I/O will have taken all necessary action 
to permit it to issue to Stockholder the number of shares of I/O Common Stock 
required to be issued pursuant to Section 2.  Such I/O Common Stock, when 
issued, will be validly issued, fully paid and nonassessable and will be 
"Restricted Stock" within the meaning of SEC Rule 144 promulgated under the 
Securities Act.

       4.6    I/O SEC REPORTS.  I/O has delivered to the Stockholder the 
Private Placement Memorandum and each registration statement, report, press 
releases or proxy statement prepared by it since May 31, 1998, and all 
exhibits filed or incorporated by reference thereto including (i) I/O's 
Annual Report on Form 10-K for the year ended May 31, 1998, (ii) I/O's  
Quarterly Report on Form 10-Q for its fiscal quarter ended August 31, 1998 
and (iii) I/O's definitive proxy statement prepared in connection with its 
annual meeting of stockholders to be held on September 28, 1998, all in the 
form (including any amendments thereto) as filed with the SEC and all reports 
and proxy materials filed by I/O with the SEC at any time after May 31, 1998 
(collectively, the "I/O SEC Reports").  As of their respective dates, the I/O 
SEC Reports did not, and any I/O SEC Reports filed with the SEC subsequent to 
the date hereof, and prior to the Effective Time will not, and the Private 
Placement Memorandum does not, contain any untrue statement of a material 
fact or omit to state a material fact required to be stated therein or 
necessary to make the statements made therein, in light of the circumstances 
in which they were made, not misleading; to I/O's Knowledge, all such I/O SEC 
Reports complied as to form, in all material respects, with all applicable 
Legal Requirements.  Since the filing of I/O's latest current report on Form 
10-Q, there has been no material adverse change in the business or financial 
prospects of I/O that has not been disclosed through press releases issued by 
I/O.  Each of the consolidated balance sheets included in or incorporated by 
reference into the I/O SEC Reports (including the related notes and 
schedules) fairly presents the consolidated financial position of I/O and its 
subsidiaries as of its date and each of the consolidated statements of income 
and of cash flow included in or incorporated by reference into the I/O SEC 
Reports (including any related notes and schedules) fairly presents the 
results of operations, retained earnings and changes in cash flow, as the 
case may be, of I/O and its subsidiaries for the periods set forth therein 
(subject, in the case of unaudited statements, to notes and normal year end 
audit adjustments that will not be material in amount or effect), in each 
case in accordance with GAAP consistently applied during the periods 
involved, except as may be noted therein.
       
       4.7     INVESTMENT REPRESENTATIONS.

       (a)    I/O is an "accredited investor" within the meaning of 
Regulation D under the Securities Act.  I/O will acquire the shares of 
DigiCourse pursuant to the Merger solely for the purpose of investment, for 
its own account, and not with a view to any distribution thereof within the 
meaning of Section 2(11) of the Securities Act.   

                                       25
<PAGE>

       (b)    I/O understands that the shares of DigiCourse will not have 
been registered under the Securities Act, that there is no established market 
for the shares of DigiCourse, and that the shares of DigiCourse must be held 
indefinitely and cannot be transferred unless an exemption from such 
registration is available with respect to such transfer. 
       
       (c)    I/O, alone or in conjunction with its advisors, has such 
knowledge and experience in financial and business matters that it is capable 
of evaluating the merits and risks of an investment in the shares of 
DigiCourse and of making an informed investment decision with respect thereto.
       
       (d)    I/O is able to bear the economic risk of an investment in the 
shares of DigiCourse.
       
       (e)    I/O and its advisors have been given access to all documents, 
books and additional information concerning DigiCourse and Limited which they 
have requested.  I/O has been represented by legal counsel and investment 
bankers in this transaction and such advisors have been given the opportunity 
to ask questions of, and receive answers from, the officers of DigiCourse and 
Limited concerning the affairs and business and financial condition of 
DigiCourse and Limited.  I/O has conducted such investigations in making a 
decision to enter into this Agreement and the Contemplated Transactions as 
I/O and its advisors have deemed necessary and advisable.

       4.8    TAX REPRESENTATIONS.

       (a)    I/O Marine was formed solely for the purpose of merging into 
DigiCourse in accordance with this Agreement.
       
       (b)    Except for assets transferred by I/O to I/O Marine pursuant to 
this Agreement, prior to the Effective Time, I/O Marine will have no 
historical assets or liabilities, and except for this Agreement, and no 
Contracts. Accordingly, DigiCourse will assume no liabilities of I/O Marine 
and I/O Marine will not transfer to DigiCourse any assets subject to 
liabilities.

       (c)    Assets transferred for purposes of this Agreement by I/O to I/O 
Marine, or by I/O to the Surviving Corporation, were transferred pursuant to 
this Agreement and Plan of Merger for the purpose set forth in Treasury 
Regulations Section 1.368-2(j)(3).

       (d)    All of the issued and outstanding shares of stock of I/O Marine 
are owned by I/O such that I/O Marine is a 100% owned subsidiary of I/O; I/O 
has been and immediately prior to the Merger will be in control of I/O Marine 
within the meaning of Section 368 of the  Code.

       (e)    Following the Merger of I/O Marine into DigiCourse pursuant to 
the terms of this Agreement and Merger, DigiCourse will hold substantially 
all of the properties of I/O Marine and DigiCourse, other than the Merger 
Consideration, all within the meaning of Code Section 368(a)(2)(E).

                                       26
<PAGE>

       (f)    Merger Consideration transferred to the Stockholder in exchange 
for the Shares will be voting common stock of I/O within the meaning of Code 
Section 368(a)(2)(E) (aside from any Net Working Capital adjustment payments 
under Section 2.5(a)(ii))

       (g)    After the completion of the Agreement, I/O will control 
DigiCourse within the meaning of Code Section 368(c).

       (h)    I/O has no present plan or intention to liquidate DigiCourse; 
to merge DigiCourse with or into another corporation; to sell or otherwise 
dispose of the stock of DigiCourse except for transfers of stock to 
corporations controlled by I/O; or to cause DigiCourse to sell or otherwise 
dispose of any of its assets or any of the assets acquired from I/O Marine, 
except for dispositions made in the Ordinary Course of Business or transfers 
of assets to a corporation controlled by DigiCourse.

       (i)    Following the Merger, DigiCourse will continue its historic 
business.

       4.9    RELIANCE.  I/O and I/O Marine acknowledge, warrant, represent, 
and agree that neither of them has relied or will rely, in connection with 
the transactions contemplated by this Agreement, upon any representation, 
warranty, fact or statement (or failure to make any statement) of or by the 
Stockholder except the Stockholder's representations and warranties expressly 
set forth in this Agreement.  Nothing contained in this Agreement constitutes 
an acknowledgment by Stockholder that it has offered or sold to I/O any 
"securities," as such term is defined in the Securities Act and applicable 
state securities laws. 

5.     REPRESENTATIONS AND WARRANTIES OF I/O MARINE

       I/O and I/O Marine, jointly and severally, represent and warrant to 
Stockholder as follows:

       5.1    ORGANIZATION AND GOOD STANDING.  I/O Marine is a corporation 
duly organized, validly existing, and in good standing under the laws of the 
State of Louisiana with full corporate power and authority to conduct its 
business as it is now conducted, to own and use the properties and assets 
that it purports to own or use and to perform all its obligations under all 
Contracts to which it is a party.

       5.2    AUTHORITY; NO CONFLICT.

       (a)    This Agreement constitutes the legal, valid, and binding 
obligation of I/O Marine, enforceable against I/O Marine in accordance with 
its terms.  I/O Marine has the absolute and unrestricted right, power, and 
authority to execute and deliver this Agreement and to perform its 
obligations under this Agreement.

       (b)    Neither the execution and delivery of this Agreement by I/O 
Marine nor the consummation or performance of any of the Contemplated 
Transactions by I/O Marine will, 

                                       27
<PAGE>

directly or indirectly (with or without notice or the lapse of time), 
contravene, conflict with or result in a violation of:

              (i)    any provision of I/O Marine's Organizational Documents;

              (ii)   any resolution adopted by the board of directors or the
       shareholders of I/O Marine;

              (iii)  any Legal Requirement or Order to which I/O Marine or any
       of its assets may be subject; or

              (iv)   any Contract to which I/O Marine is a party or by which I/O
       Marine or any of its assets may be bound.

Except for satisfaction of the HSR requirements, I/O Marine is not and will 
not be required to obtain any Consent from any Person in connection with the 
execution and delivery of this Agreement or the consummation or performance 
of any of the Contemplated Transactions.

       5.3    CERTAIN PROCEEDINGS.  There is no pending Proceeding that has 
been commenced against I/O Marine and that challenges, or may have the effect 
of preventing, delaying, making illegal, or otherwise interfering with, any 
of the Contemplated Transactions or that involves material claims not 
disclosed in the I/O SEC Reports against I/O or I/O Affiliates. To I/O 
Marine's Knowledge, no such Proceeding has been Threatened.

       5.4    BROKERS OR FINDERS.  I/O Marine and its officers and agents 
have incurred no obligation or liability, contingent or otherwise, for 
brokerage or finders' fees or agents' commissions or other similar payment in 
connection with this Agreement and will indemnify and hold Stockholder 
harmless from any such payment alleged to be due from Stockholder by or 
through I/O Marine as a result of the action of I/O Marine or its officers or 
Representatives.

       5.5    I/O MARINE CAPITALIZATION.  The authorized capital stock of I/O 
Marine consists of 1,000 shares of common stock ("I/O Marine Common Stock"), 
all of which is issued to and owned by I/O, free of any Encumbrances.  All of 
the outstanding shares of I/O Marine Common Stock have been duly authorized 
and are validly issued, fully paid and nonassessable.  Except as stated 
above, there are no preemptive or other outstanding rights, options, 
warrants, conversion rights, stock appreciation rights, redemption rights, 
repurchase rights, agreements, arrangements or commitments to issue or to 
sell any shares of capital stock or other securities of I/O Marine or any 
securities or obligations convertible or exchangeable into or exercisable 
for, or giving any Person a right to subscribe for or acquire, any securities 
of I/O Marine and no securities or obligation evidencing such rights are 
authorized, issued or outstanding.  I/O Marine does not have outstanding any 
bonds, debentures, notes or other obligations the holders of which have the 
right to vote (or convertible into or exercisable for securities having the 
right to vote) with the stockholder of I/O Marine on any matter.

                                       28
<PAGE>

       5.6    ASSETS AND LIABILITIES.  Prior to and at the Closing, I/O 
Marine will have no material assets or liabilities, no Affiliates that are 
subsidiaries and, except for this Agreement, no Contracts.

6.     CONDITIONS PRECEDENT TO I/O'S AND I/O MARINE'S OBLIGATION TO CLOSE

       The obligation of each of I/O and I/O Marine to consummate the 
Contemplated Transactions, and to take the other actions required to be taken 
by I/O and I/O Marine at the Closing is subject to the satisfaction, at or 
prior to the Closing, of each of the following conditions (any of which may 
be waived, if permitted by law, by I/O and I/O Marine, in whole or in part):

       6.1    ACCURACY OF REPRESENTATIONS.  All of Stockholder's and 
DigiCourse's representations and warranties in this Agreement (considered 
collectively), and each of these representations and warranties (considered 
individually), must be accurate in all material respects as of the date of 
this Agreement and as of the Economic Closing Date.

       6.2    STOCKHOLDER'S PERFORMANCE.  All of the covenants and 
obligations that Stockholder is required to perform or to comply with 
pursuant to this Agreement at or prior to the Closing (considered 
collectively), and each of these covenants and obligations (considered 
individually), must have been duly performed and complied with in all 
material respects.

       6.3    ADDITIONAL DOCUMENTS.  Each of the following documents must 
have been delivered to I/O and I/O Marine:

       (a)    the Certificate of Merger, duly executed and acknowledged by 
Stockholder and DigiCourse to the extent required by the LBCL;

       (b)    certificates of the Secretary of State and the taxing 
authorities of Louisiana dated not more than ten days prior to the Closing 
Date, attesting to the organization and good standing of DigiCourse, and to 
the payment of all state taxes due and owing thereby, if Louisiana issues 
such a certificate;

       (c)    copies, certified by the Secretary of State of Louisiana as of 
a date not more than five days prior to the Closing Date, of the articles of 
incorporation of DigiCourse, and all amendments thereto;

       (d)    copies, certified by the Secretary of DigiCourse as of the 
Closing Date, of the bylaws of DigiCourse, and all amendments thereto; and

       (e)    copies, certified by the Secretary of DigiCourse as of the 
Closing Date, of resolutions duly adopted by the Stockholder and Board of 
Directors of DigiCourse,  authorizing the execution and delivery by 
DigiCourse of this Agreement and all other agreements attached 

                                       29
<PAGE>

hereto as exhibits or contemplated herein, the consummation of the Merger, 
and the taking of all such other corporate action as shall have been required 
as a condition to or in connection with the consummation of the Contemplated 
Transactions.

       6.4    NO CLAIM REGARDING STOCK OWNERSHIP OR SALE PROCEEDS.  There 
must not have been made or Threatened by any Person any claim asserting that 
such Person (a) is the holder or the beneficial owner of, or has the right to 
acquire or to obtain beneficial ownership of, any stock of, or any other 
voting, equity, or ownership interest in DigiCourse, or (b) is entitled to 
all or any portion of the Merger Consideration.

       6.5    NO PROHIBITION.  Neither the consummation nor the performance 
of any of the Contemplated Transactions will, directly or indirectly (with or 
without notice or lapse of time), materially contravene, or conflict with, or 
result in a material violation of, or cause I/O or any Person affiliated with 
I/O to suffer any material Adverse Consequences under, (a) any applicable 
Legal Requirement or Order, or (b) any Legal Requirement or Order that has 
been published, introduced, or otherwise proposed by or before any 
Governmental Body.

       6.6    NO MATERIAL ADVERSE CHANGE.  There shall not have been, since 
the date of the Interim Balance Sheets through the Economic Closing Date, any 
material adverse change in the business, operations, properties, assets, or 
financial condition of DigiCourse or Limited.

       6.7    OPINIONS OF COUNSEL.  I/O shall have received, in a form 
satisfactory to it in its reasonable commercial discretion, opinions, 
addressed to it, of (i) its counsel to the effect that this Agreement, and 
the Registration Rights Agreement are enforceable against Stockholder in 
accordance with their respective terms; and (ii) Correro Fishman Haygood 
Phelps Walmsley & Casteix, L.L.P., to the effect that the shares of 
DigiCourse and Limited (relying upon British counsel's opinion as necessary 
regarding Limited) to be delivered to I/O under this Agreement are, at the 
Closing, duly and validly authorized and issued and fully paid and 
nonassessable.

       6.8    HSR CLEARANCE. Closing shall not occur until the receipt of any 
required Government Authorization, including Government Authorization 
(whether by lapse of requisite waiting period or otherwise) following filings 
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (as amended) 
("HSR").  I/O agrees to pay the entire HSR filing fee.

       6.9    EMPLOYMENT ARRANGEMENT.  I/O and Roy Kelm shall have agreed 
upon post-Closing employment terms and conditions acceptable to I/O.

       6.10   RELEASE OF GUARANTY.  DigiCourse shall have been released as a 
guarantor (and from any similar obligation) with respect to any indebtedness 
of Stockholder or any Stockholder Affiliates.

       6.11   DUE DILIGENCE.  I/O shall have completed its due diligence 
investigation of DigiCourse, Limited and the Contemplated Transactions, with 
results satisfactory to I/O, and shall have received and timely reviewed 
(five days after receipt) the Disclosure Letter.  

                                       30

<PAGE>

7.     CONDITIONS PRECEDENT TO STOCKHOLDER'S AND DIGICOURSE'S OBLIGATION TO
       CLOSE

       The obligation of DigiCourse and the Stockholder to consummate the 
Contemplated Transactions and to take the other actions required to be taken 
by Stockholder and DigiCourse at the Closing is subject to the satisfaction, 
at or prior to the Closing, of each of the following conditions (any of which 
may be waived by Stockholder and DigiCourse, in whole or in part):

       7.1    ACCURACY OF REPRESENTATIONS.  All of I/O's and I/O Marine's 
representations and warranties in this Agreement (considered collectively), 
and each of these representations and warranties (considered individually), 
must be accurate in all material respects as of the date of this Agreement 
and as of the Closing Date.

       7.2    I/O'S PERFORMANCE.

       (a)    All of the covenants and obligations that I/O and I/O Marine 
are required to perform or to comply with pursuant to this Agreement at or 
prior to the Closing (considered collectively), and each of these covenants 
and obligations (considered individually), must have been performed and 
complied with in all material respects.

       (b)    I/O must have delivered each of the documents required to be 
delivered by I/O pursuant to Section 2.4 and must have delivered the Merger 
Consideration.

       7.3    ADDITIONAL DOCUMENTS.  I/O must have caused the following 
documents to be delivered to Stockholder:

       (a)    the Certificate of Merger, duly executed by each of I/O and I/O 
Marine, to the extent required by the LBCL;  

       (b)    certificates of the Secretary of State and the taxing 
authorities of Delaware or Louisiana, as applicable, dated not more than ten 
days prior to the Closing Date, attesting to the organization and good 
standing of each of I/O and I/O Marine as a corporation in its jurisdiction 
of incorporation, and to the payment of all state taxes due and owing thereby 
(if available in Louisiana);

       (c)    copies, certified by the Secretary of State of Delaware or 
Louisiana, as applicable, as of a date not more than ten days prior to the 
Closing Date of the articles or certificate of incorporation of each of I/O 
and I/O Marine, and all amendments thereto;

       (d)    copies, certified by the Secretary of I/O as of the Closing 
Date, of the bylaws of each of I/O and I/O Marine, and all amendments thereto;

       (e)    copies, certified by a certificate of the Secretary of I/O and 
I/O Marine as of the Closing Date, of resolutions duly adopted by the boards 
of directors of each of I/O and I/O 

                                       31
<PAGE>

Marine, and by I/O as sole stockholder of I/O Marine, authorizing the 
execution and delivery by I/O and I/O Marine of this Agreement and all other 
agreements attached hereto as Exhibits or contemplated herein, the 
consummation of the Merger, and the taking of all such other corporate action 
as shall have been required as a condition to, or in connection with the 
consummation of the Contemplated Transactions. 

       7.4    NO PROHIBITION.  Neither the consummation nor the performance 
of any of the Contemplated Transactions will, directly or indirectly (with or 
without notice or lapse of time), materially contravene, or conflict with, or 
result in a material violation of, or cause Stockholder or any Person 
affiliated with Stockholder to suffer any material Adverse Consequences 
under, (a) any applicable Legal Requirement or Order, or (b) any Legal 
Requirement or Order that has been published, introduced, or otherwise 
proposed by or before any Governmental Body.

       7.5    NYSE LISTING.  The shares of I/O Common Stock issuable to the 
Stockholder pursuant to this Agreement shall have been approved for listing 
on the NYSE upon and subject to official notice of issuance.

       7.6    OPINIONS OF COUNSEL.  Stockholder shall have received, in a 
form satisfactory to it in its reasonable commercial discretion, opinions, 
addressed to the Stockholder, of (i) its special Delaware counsel to the 
effect that this Agreement and the Registration Rights Agreement are 
enforceable against I/O in accordance with their respective terms; (ii) its 
tax counsel, to the effect that the Merger will for tax purposes constitute a 
reorganization under Section 368(a)(2)(E) of the Code and that, accordingly, 
the Stockholder will not incur any recognized gain or loss by reason of its 
receipt of shares of I/O capital stock pursuant to the Merger; and (iii) 
Haynes and Boone, L.L.P. to the effect that the shares of I/O Common Stock to 
be delivered to the Stockholder under this Agreement are, at the Closing, 
duly and validly authorized and issued and fully paid and nonassessable.
       
       7.7    SECTION 2.5 PAYMENT.  Stockholder shall have no reasonable 
expectation that any payment that may become due to it pursuant to Section 
2.5 of this Agreement might exceed in amount 19% of the aggregate value of 
the Merger Consideration.

       7.8    FAIRNESS OPINION.  DigiCourse and the Stockholder shall have 
received the opinion of NationsBanc Montgomery Securities, LLP, addressed to 
DigiCourse and the Stockholder, in form satisfactory to each of them in its 
reasonable commercial discretion, to the effect that the Merger Consideration 
is fair to the Stockholder from a financial point of view.

       7.9    NO MATERIAL ADVERSE CHANGE.  There shall not have been, since 
September 1, 1998, any material adverse change in the business, operation, 
properties, assets, or financial condition of I/O, other than those factors 
generally affecting I/O's industry. 
       
       7.10   HSR CLEARANCE. Closing shall not occur until the receipt of any 
required Government Authorization, including Government Authorization 
(whether by lapse of requisite 

                                       32
<PAGE>

waiting period or otherwise) following filings under the HSR.  I/O agrees to 
pay the entire HSR filing fee.
 
8.     INDEMNIFICATION; REMEDIES

       8.1    SURVIVAL.  All representations, warranties, covenants, and 
obligations contained in this Agreement, the Disclosure Letter, and any other 
certificate or document delivered pursuant to this Agreement will survive the 
Closing Date, but solely to support a timely claim for indemnification 
pursuant to Section 8 thereto; PROVIDED, HOWEVER, that claims for 
indemnification in respect of Breaches relating to the Environment, ERISA and 
Taxes representations and warranties may be made until six (6) years after 
the Economic Closing Date and indemnification for claims against title to the 
Shares or the Merger Consideration shall survive without expiration, but all 
other claims for indemnification for Breaches of this Agreement must be made 
within eighteen (18) months after the Economic Closing Date.  Stockholder has 
the option of performing, at its expense, in a safe manner not disrupting 
Surviving Corporation's operations, Environment remediation for any 
indemnified claim that is related to the Environment.

       8.2    INDEMNIFICATION AND PAYMENT OF DAMAGES BY STOCKHOLDER.  

       (a)    Stockholder will indemnify and hold harmless I/O, I/O Marine, 
and their respective Representatives, stockholders, controlling persons, and 
affiliates (collectively, the "I/O Indemnified Persons") for, and will pay to 
the I/O Indemnified Persons the amount of Adverse Consequences, arising, 
directly or indirectly, from or in connection with (i) any Breach of any 
representation, warranty or covenant made by DigiCourse or Stockholder in 
this Agreement other than the performance of DigiCourse with respect to 
post-Closing covenants, the Disclosure Letter, or any other certificate or 
document delivered by Stockholder at the Closing pursuant to this Agreement 
and (ii) the Yardney lithium batteries that were incorporated into DigiCourse 
products and any litigation of claims in connection therewith (the "Yardney 
Litigation").  
              
       (b)    The amount of Adverse Consequences payable by the Stockholder 
pursuant to this Section 8.2 will not exceed $30,000,000 in the aggregate, 
except for claims to rights in the Shares which shall not be subject to any 
ceiling amount.  

       (c)    I/O Indemnified Persons shall not be entitled to assert any 
claim for indemnification under this Section 8.2 unless and until such time 
as all claims of I/O Indemnified Persons for indemnification exceed 
$1,000,000 in the aggregate, at which time any and all claims of I/O for 
indemnification may be asserted. 
       
       8.3    INDEMNIFICATION AND PAYMENT OF DAMAGES BY I/O.  
       
       (a)    I/O and I/O Marine will, jointly and severally, indemnify and 
hold harmless Stockholder and Stockholder's Representatives ("Stockholder 
Indemnified Persons"), and will 

                                       33
<PAGE>

pay to Stockholder Indemnified Persons, the amount of any Adverse 
Consequences arising, directly or indirectly, from or in connection with (i) 
any Breach of any representation or warranty made by I/O or I/O Marine in 
this Agreement or in any certificate delivered by I/O or I/O Marine pursuant 
to this Agreement, (ii) any Breach by I/O or I/O Marine of any covenant or 
obligation of I/O or I/O Marine in this Agreement, (iii) any post-Closing 
performance obligations of the Surviving Corporation required by this 
Agreement, or (iv) any claim by any Person for brokerage or finder's fees or 
commissions or similar payments based upon any agreement or understanding 
alleged to have been made by such Person with I/O (or any Person acting on 
its behalf) in connection with any of the Contemplated Transactions.

       (b)    Stockholder Indemnified Persons shall not be entitled to assert 
any claim for indemnification under this Section 8.3 unless and until such 
time as all claims of Stockholder Indemnified Persons for indemnification 
exceed $1,000,000 in the aggregate, at which time any and all claims of 
Stockholder Indemnified Persons for indemnification may be asserted.  

       (c)    The amount of Adverse Consequences payable pursuant to this 
Section 8.3 by I/O and/or I/O Marine will exceed not $30,000,000 in the 
aggregate, except for claims to rights in the I/O Common Stock delivered to 
Stockholder under this Agreement, which shall not be subject to any ceiling 
amount.
         
       8.4    PROCEDURE FOR INDEMNIFICATION -- THIRD PARTY CLAIMS.

       (a)    Promptly after receipt by a I/O Indemnified Person or 
Stockholder Indemnified Person ("Indemnified Person") under Section 8.2 or 
Section 8.3 of notice of the commencement of any Proceeding against it, such 
Indemnified Person will, if a claim is to be made against an indemnifying 
party under such Section, give notice to the indemnifying party of the 
commencement of such claim, but the failure to notify the indemnifying party 
will not relieve the indemnifying party of any liability that it may have to 
any Indemnified Person, except to the extent that the indemnifying party 
demonstrates that the defense of such action is prejudiced by the Indemnified 
Person's failure to give such notice, or the notice is outside the time 
limitations of Section 8.1.

       (b)    If any Proceeding referred to in Section 8.4(a) is brought 
against an Indemnified Person and the Indemnified Person gives timely notice 
to the indemnifying party of the commencement of such Proceeding, the 
indemnifying party will be entitled to participate in such Proceeding and, to 
the extent that it wishes to assume the defense of such Proceeding with 
counsel satisfactory to the Indemnified Person and, after notice from the 
indemnifying party to the Indemnified Person of its election to assume the 
defense of such Proceeding, the indemnifying party will not, as long as it 
diligently conducts such defense, be liable to the Indemnified Person under 
this Section 8 for any fees of other counsel or any other expenses with 
respect to the defense of such Proceeding, in each case subsequently incurred 
by the Indemnified Person in connection with the defense of such Proceeding, 
other than reasonable costs of investigation. If the indemnifying party 
assumes the defense of a Proceeding, (i) no compromise or settlement of such 
claims  may be effected by the indemnifying party without the Indemnified 
Person's consent unless (A) there is no finding or admission of any violation 

                                       34
<PAGE>

of Legal Requirements or any violation of the rights of any Person and no 
effect on any other claims that may be made against the Indemnified Person, 
and (B) the sole relief provided is monetary damages that are paid in full by 
the indemnifying party; and (ii) the Indemnified Person will have no 
liability with respect to any compromise or settlement of such claims 
effected without its consent. If notice is given to an indemnifying party of 
the commencement of any Proceeding and the indemnifying party does not, 
within thirty days after the Indemnified Person's notice is given, give 
notice to the Indemnified Person of its election to assume the defense of 
such Proceeding, the indemnifying party will be bound by any determination 
made in such Proceeding or any compromise or settlement effected by the 
Indemnified Person.

       (c)    Notwithstanding the foregoing, if an Indemnified Person 
determines in good faith that there is a reasonable probability that a 
Proceeding may adversely affect it other than as a result of monetary damages 
for which it would be entitled to indemnification under this Agreement, the 
Indemnified Person may, by notice to the indemnifying party, assume the 
exclusive right to defend, compromise, or settle such Proceeding, but the 
indemnifying party will not be bound by any determination of a Proceeding so 
defended or any compromise or settlement effected without its consent (which 
may not be unreasonably withheld).

       8.5    PROCEDURE FOR INDEMNIFICATION -- OTHER CLAIMS.  A claim for 
indemnification for any matter not involving a third-party claim may be 
asserted by notice to the party from whom indemnification is sought within 
the Section 8.1 time limits.

       8.6    CALCULATION OF ADVERSE CONSEQUENCES. The parties shall make 
appropriate adjustments for tax benefits and insurance coverage and shall 
take into account the time cost of money in determining the amount of 
indemnified Adverse Consequences.  Indemnified Adverse Consequences will be 
without duplication with respect to Stockholder Indemnified Persons, on one 
hand, and I/O Indemnified Persons, on the other hand.

       8.7    KNOWLEDGE LIMITATION.  If I/O had Knowledge, prior to Closing, 
of facts that would give rise to a Breach by Stockholder, DigiCourse or 
Limited of a representation, warranty or covenant upon Closing, then 
Stockholder shall have no duty to indemnify that specific claim of Adverse 
Consequences, except to the extent that Stockholder, DigiCourse or Limited 
also had Knowledge, a duty to disclose under this Agreement and failed to 
disclose these facts.

       If Stockholder or DigiCourse had Knowledge, prior to closing, of facts 
that would give rise to a Breach by I/O or I/O Marine of a representation, 
warranty or covenant upon Closing, then I/O and I/O Marine shall have no duty 
to indemnify that specific claim of Adverse Consequences except to the extent 
that I/O also had Knowledge, a duty to disclose under this Agreement, and 
failed to disclose these facts.

       If a party has Knowledge of any Breach of another party's 
representations and warranties given in this Agreement prior to Closing, the 
party with Knowledge shall, prior to Closing, give notice to the potentially 
breaching party of those facts. 

                                       35
<PAGE>

       8.8    EXCLUSIVE REMEDY.  Following the Closing, except as 
specifically excluded from Section 8 elsewhere in this Agreement, the 
indemnification provisions in this Section 8 are the sole and exclusive 
remedy (except for any injunctive remedy that may be available) any party may 
have for Breach of representation, warranty or covenant of the Agreement or 
any other matters provided for in this Agreement.

       8.9    NO THIRD PARTY BENEFICIARIES.  The foregoing indemnification is 
given solely for the purpose of protecting the parties to this Agreement and 
the Indemnified Persons and shall not be deemed extended to, or interpreted 
in a manner to confer any benefit, right or cause of action upon, any other 
Person.

9.     GENERAL PROVISIONS

       9.1    EXPENSES. Each of Stockholder and I/O will bear its respective 
expenses incurred in connection with the preparation, execution, and 
performance of this Agreement and the Contemplated Transactions, including 
all fees and expenses of agents, representatives, counsel, and accountants.  
I/O will pay all amounts payable to Schnitzius & Vaughan in connection with 
this Agreement and the Contemplated Transactions.  Stockholder will pay all 
fees payable to NationsBanc Montgomery Securities, LLP and to counsel and 
accountants to DigiCourse and to Stockholder with respect to legal, 
financial, accounting or other professional services in connection with this 
Agreement and the Contemplated Transactions.  Stockholder will cause 
DigiCourse not to incur any out-of-pocket expenses in connection with this 
Agreement.

       9.2    PUBLIC ANNOUNCEMENTS.  Except under Legal Requirements, no 
information concerning Stockholder will be publicized by I/O without 
Stockholder's prior consent, which consent shall not be unreasonably 
withheld. Any public announcement or similar publicity with respect to this 
Agreement or the Contemplated Transactions will be issued, if at all, at such 
time and in such manner as I/O determines with 24 hour advance written notice 
to Stockholder, giving Stockholder an opportunity to review the proposed 
release, subject to Legal Requirements deadlines. Unless consented to by I/O 
in advance or required by Legal Requirements, prior to the Closing, 
Stockholder shall use reasonable efforts, and shall cause DigiCourse to use 
reasonable efforts, to keep this Agreement strictly confidential and may not 
make any disclosure of this Agreement to any Person. Stockholder and I/O will 
consult with each other concerning the means by which DigiCourse's employees, 
customers, and suppliers and others having dealings with DigiCourse will be 
informed of the Contemplated Transactions, and I/O will have the right to be 
present for any such communication.

       9.3    CONFIDENTIALITY. Between the date of this Agreement and the 
Closing Date, the parties will maintain in confidence, and will cause their 
directors, officers, employees, agents, and advisors to maintain in 
confidence, and not use to the detriment, except as contemplated by this 
Agreement, of another party hereto any written, oral, or other information 
obtained in confidence from such other party in connection with this 
Agreement or the Contemplated Transactions, unless (a) such information is 
already known to such party (other than through delivery by the proprietor 
party in connection with the Contemplated Transactions) or to others 

                                       36
<PAGE>

not bound by a duty of confidentiality or such information becomes publicly 
available through no fault of such party, (b) the use of such information is 
necessary or required in making any filing or obtaining any consent or 
approval required for the consummation of the Contemplated Transactions, or 
(c) the furnishing or use of such information is required by an Order in 
connection with legal proceedings.

       If the Contemplated Transactions are not consummated, each party will 
return or destroy as much of such written information as the other party may 
request.
       
       Whether the Closing takes place, each party waives any cause of 
action, right, or claim arising out of the access of a recipient party or its 
representatives to any trade secrets or other confidential information of the 
disclosing party except for the intentional competitive misuse by the 
recipient party of such trade secrets or confidential information.

       9.4    NOTICES.  All notices, consents, waivers, and other 
communications under this Agreement must be in writing and will be deemed to 
have been duly given when (a) delivered by hand (with written confirmation of 
receipt), (b) sent by telecopier (with written confirmation of receipt), 
provided that a copy is mailed by registered mail, return receipt requested, 
or (c) when received by the addressee, if sent by a nationally recognized 
overnight delivery service (receipt requested), in each case to the 
appropriate addresses and telecopier numbers set forth below (or to such 
other addresses and telecopier numbers as a party may designate by notice to 
the other parties):

              STOCKHOLDER:

              The Laitram Corporation
              220 Laitram Lane
              Harahan, La. 70123
              Attn:  General Counsel

              Facsimile No.:  (504) 734-5233

              I/O: 

              Input/Output, Inc.
              11104  West Airport Boulevard, Suite 200
              Stafford, Texas 77477
              Attn:  General Counsel

              Facsimile No.: (281) 879-3649

       9.5    FURTHER ASSURANCES.  The parties agree (a) to furnish upon 
request to each other such further information, (b) to execute and deliver to 
each other such other documents, and (c) to do such other acts and things, 
all as another party may reasonably request for the 

                                       37
<PAGE>

purpose of carrying out the intent of this Agreement and the documents 
referred to in this Agreement.

       9.6    WAIVER.  The rights and remedies of the parties to this 
Agreement are cumulative and not alternative. Neither the failure nor any 
delay by any party in exercising any right, power, or privilege under this 
Agreement or the documents referred to in this Agreement will operate as a 
waiver of such right, power, or privilege, and no single or partial exercise 
of any such right, power, or privilege will preclude any other or further 
exercise of such right, power, or privilege or the exercise of any other 
right, power, or privilege. To the maximum extent permitted by applicable 
law, (a) no waiver that may be given by a party will be applicable except in 
the specific instance for which it is given; and (b) no notice to or demand 
on one party will be deemed to be a waiver of any obligation of such party or 
of the right of the party giving such notice or demand to take further action 
without notice or demand as provided in this Agreement or the documents 
referred to in this Agreement.

       9.7    ENTIRE AGREEMENT AND MODIFICATION.  Except for the existing 
confidentiality agreement between the parties dated June 4, 1998, this 
Agreement supersedes all prior agreements between the parties with respect to 
its subject matter and constitutes (along with the documents referred to in 
this Agreement) a complete and exclusive statement of the terms of the 
agreement between the parties with respect to its subject matter. This 
Agreement may not be amended except by a written agreement executed by the 
parties.  There are no representations or warranties of the parties given 
with respect to the Contemplated Transactions except for those expressly 
given in this Agreement, and any and all implied representations or 
warranties are expressly disclaimed.

       9.8    ASSIGNMENTS, SUCCESSORS, AND NO THIRD PARTY RIGHTS.  No  party 
may assign any of its rights under this Agreement without the prior consent 
of the other parties, which will not be unreasonably withheld.  Subject to 
the preceding sentence, this Agreement will apply to, be binding in all 
respects upon, and inure to the benefit of the successors and permitted 
assigns of the parties. Nothing expressed or referred to in this Agreement 
will be construed to give any Person other than the parties to this Agreement 
any legal or equitable right, remedy, or claim under or with respect to this 
Agreement or any provision of this Agreement. This Agreement and all of its 
provisions and conditions are for the sole and exclusive benefit of the 
parties to this Agreement and their permitted successors and assigns.

       9.9    SEVERABILITY.  If any court of competent jurisdiction holds any 
provision of this Agreement, or any agreement provided for by this Agreement, 
invalid or unenforceable, the unaffected provisions of this Agreement or that 
agreement will remain in full force and effect. Any provision of this 
Agreement held invalid or unenforceable only in part or degree will remain in 
full force and effect to the extent not held invalid or unenforceable.

       9.10   SECTION HEADINGS, CONSTRUCTION.  The headings of Sections in 
this Agreement are provided for convenience only and will not affect its 
construction or interpretation. All references to "Section" or "Sections" 
refer to the corresponding Section or Sections of this 

                                       38
<PAGE>

Agreement. All words used in this Agreement will be construed to be of such 
gender or number as the circumstances require. Unless otherwise expressly 
provided, the word "including" does not limit the preceding words or terms.

       9.11   TIME OF ESSENCE.  With regard to all dates and time periods set 
forth or referred to in this Agreement, time is of the essence.

       9.12   GOVERNING LAW.  THIS AGREEMENT WILL BE GOVERNED BY THE LAWS OF 
THE STATE OF DELAWARE WITHOUT REGARD TO CONFLICTS OF LAW PRINCIPLES.

       9.13   COUNTERPARTS.  This Agreement may be executed in one or more 
counterparts, each of which will be deemed to be an original copy of this 
Agreement and all of which, when taken together, will be deemed to constitute 
one and the same agreement.
       
       9.14   DISPUTE RESOLUTION. If a disagreement under this Agreement 
arises between Stockholder and I/O, prior to sending a formal demand letter 
from counsel or demanding arbitration, Stockholder and I/O will seek in good 
faith to resolve the dispute.  Resolution will not be considered 
unachieveable until the matter has been turned over to an executive officer 
of Stockholder and I/O respectively, and they are unable to resolve the 
matter.  Unreasonable delay on the part of an officer to attend to a dispute 
will indicate that agreement is unachieveable.  Resolution between 
Stockholder and I/O in a dispute may include disposition of the matter, 
agreement to submit the dispute to arbitration, or agreement upon another 
conciliatory method of resolution.  All parties agree to submit to mandatory 
and binding arbitration under American Arbitration Association Rules of 
Commercial Arbitration (i) any disputes not resolved in accordance with the 
foregoing procedure of Section 9.14 or (ii) if KPMG fails to determine the 
Economic Closing Net Working Capital within sixty (60) days after the 
Economic Closing Date.  Arbitration under (i) will be before three 
arbitrators.  Arbitration under (ii) will be held before a single arbitrator 
who must be a CPA.  Arbitration will take place in a location or locations 
specified by the arbitrators.

       9.15   CONSTRUCTION. All parties participated in drafting this 
Agreement. The rule of constructing contracts against the drafting party 
shall have no application to this Agreement.

       9.16   NO RAIDING OF EMPLOYEES. Without prior written approval from 
I/O, Stockholder and Stockholder Affiliates will not, for a period of six 
months after Closing, employ an employee of any of I/O or the I/O Affiliates. 
Thereafter, without prior written approval from I/O, for a period of an 
additional 18 months, Stockholder and Stockholder Affiliates will not (a) 
solicit for employment an employee of I/O or I/O Affiliates (other than by 
normal and customary advertising and recruiting procedures) or (b) employ any 
of the persons listed on Exhibit 9.16A.  Without prior written approval of 
Stockholder, I/O and I/O Affiliates will not, for a period of six months 
after Closing, employ an employee of any of Stockholder or Stockholder 
Affiliates. Thereafter, without prior written approval of Stockholder, for a 
period of an additional 18 months, I/O and I/O Affiliates will not (a) 
solicit for employment an employee of Stockholder 

                                       39
<PAGE>

or the Stockholder Affiliates (other than by normal and customary advertising 
and recruitment procedures) or (b) employ any of the persons listed on 
Exhibit 9.16B.

       9.17   DISCLOSURE LETTERS. The disclosures in the Disclosure Letter, 
and those in any supplement thereto, shall expressly refer to a Section of 
this Agreement; provided, however, that disclosures in the Disclosure Letter 
expressly referring to a Section of this Agreement may incorporate by 
reference the disclosures in any other Section of the Disclosure Letter by 
express reference to that other Section or if the facts and circumstances 
clearly apply the disclosure to another Section.  Stockholder shall deliver 
to I/O a Supplement to Stockholder's Disclosure Letter promptly after 
Stockholder becomes aware of any event which changes any representation or 
warranty made by Stockholder in this Agreement or any statement made in 
Stockholder's Disclosure Letter or in any Supplement.  Closing will not occur 
until two days after delivery of a Supplement.

       9.18   SHARE ADJUSTMENTS.  The I/O shares constituting the Merger 
Consideration will be equitably adjusted for any stock dividends, splits or 
any distributions to I/O stockholders with a record date prior to the 
Effective Time.
       
       9.19   TAX PROCEDURES.  Tax Procedures are contained in the attached 
Exhibit 9.19. 

       9.20   INVESTIGATIONS. 

       (a)    Between the date of this Agreement and the Closing, (i) 
Stockholder,  DigiCourse and Limited shall give to I/O and its advisors such 
access to the premises, books and records of DigiCourse and Limited and cause 
the officers, employees and accountants of DigiCourse and Limited to furnish 
such financial and operating data and other information with respect to 
DigiCourse and Limited as I/O shall from time to time reasonably request; and 
(ii) I/O shall give to Stockholder such access to the premises, books and 
records of I/O and cause the officers, employees and accountants of I/O to 
furnish such financial and operating data and other information with respect 
to I/O as Stockholder shall from time to time reasonably request. 

       (b)    In connection with the Contemplated Transactions, in addition 
to, and not by way of limitation of, any other obligations of the parties 
under or pursuant to any other agreement, whether written or oral, with 
Stockholder or any other obligations of I/O at law or in equity, all 
confidential information furnished to another party will be kept confidential 
by the recipient party's Representatives prior to the Closing Date, or in the 
event the Closing does not occur, for a period of five (5) years following 
termination of this Agreement. During such time, the recipient will hold and 
will cause its Representatives to hold in strict confidence, unless compelled 
to disclose by judicial or administrative process or, in the opinion of its 
counsel, by other requirements of law, all confidential documents and 
information in connection with the Transaction (with prior notice given to 
the parties whose information is to be disclosed). 

       9.21   TERMINATION OF THIS AGREEMENT.  The parties may terminate this 
Agreement as provided below:

                                       40

<PAGE>

       (a)    Stockholder and I/O may terminate this Agreement by mutual 
written consent at any time prior to the Closing.
              
       (b)    Stockholder may terminate this Agreement upon a material Breach 
of any representation, warranty, covenant or agreement on the part of I/O or 
I/O Marine set forth in this Agreement, or if any representation or warranty 
of I/O or I/O Marine shall have become untrue, in either case such that the 
conditions set forth in Section 7 would be incapable of being satisfied by 
November 30, 1998, unless I/O and Stockholder extend the time period by 
written mutual consent.
       
       (c)    I/O may terminate this Agreement upon a material Breach of any 
representation, warranty, covenant or agreement on the part of the 
Stockholder or DigiCourse as set forth in this Agreement, or if any 
representation or warranty of the Stockholder or DigiCourse shall have become 
untrue, in either case such that the conditions set forth in Section 6 herein 
would be incapable of being satisfied by November 30, 1998, unless I/O and 
Stockholder extend the time period by written mutual consent.
       
       (d)    I/O or Stockholder may terminate this Agreement if there shall 
be any Order preventing the consummation of the Contemplated Transactions, 
except if the party relying on such Order to terminate this Agreement has not 
complied with its obligations under this Agreement.
       
       (e)    Either I/O or Stockholder may terminate this Agreement, if the 
Exhibits to this Agreement have not been agreed upon, and attached to this 
Agreement, by the parties by October 15, 1998, or if the Closing shall not 
have been consummated before November 30, 1998.

       (f)    Stockholder may terminate this Agreement during the five (5) 
calendar days following delivery to Stockholder of the Private Placement 
Memorandum.

       (g)    I/O may terminate this Agreement during the five (5) calendar 
days following delivery of the Disclosure Letter or two (2) calendar days 
following delivery of any Supplement to the Disclosure Letter.
       
       9.22   EFFECT OF TERMINATION.  If any party terminates this Agreement 
pursuant to Section 9.21, all rights and obligations of the parties hereunder 
shall terminate without any liability, under any theory, of one party to any 
other party; and Sections 9.1, 9.3, 9.4, 9.6 through 9.16 and 9.22 shall 
survive termination of this Agreement.
       
       9.23   EFFORTS TO CONSUMMATE.  Each party shall use its Reasonable 
Efforts to cause the conditions of the obligations of the parties contained 
in this Agreement to be satisfied to the extent that the satisfaction of such 
conditions can be controlled or influenced by that party or its Affiliates. 

                                       41
<PAGE>

       9.24   EMPLOYEE MATTERS.  DigiCourse employees who are employed by 
DigiCourse immediately before the Effective Time will remain employees of the 
Surviving Corporation, subject to all employment policies of I/O.
              
       9.25   DIGICOURSE BENEFIT PLANS.  Provisions concerning the 
disposition of accounts in Plans in which DigiCourse employees participated 
prior to the Closing are contained in the Transfer Plan.

       9.26   RECORDS. 

       (a)    Following  Closing, Surviving Corporation shall give to 
Stockholder free and unrestricted access to (and the right to make copies at 
the expense of Stockholder) of DigiCourse pre-Closing records held by the 
Surviving Corporation, but any access pursuant to this Section 9.26 shall be 
conducted in such manner as not to interfere unreasonably with the operations 
of the Surviving Corporation.

       (b)    Following the Effective Time of Closing, Stockholder shall give 
to Surviving Corporation free and unrestricted access to (and the right to 
make copies at the expense of Surviving Corporation) DigiCourse's pre-Closing 
records held by Stockholder, but any access pursuant to this Section 9.26 
shall be conducted in such manner as not to interfere unreasonably with the 
operations of the business of Stockholder.

       (c)    Any access to Records pursuant to this Section shall be subject 
to the confidentiality obligations stated in Section 9.3.

       9.27   RECORDS RETENTION.  I/O agrees to cause the Surviving 
Corporation, for a period of eight (8) years after the Closing, to preserve, 
retain and permit access to and copying by the Stockholder, and its 
representatives, of all pre-Closing books, records, accounts, purchase 
orders, invoices and other material documents of or relating to DigiCourse 
together with all minute books, seals, share certificate, share ledgers and 
other corporate records and material of DigiCourse held by Surviving 
Corporation.

       9.28   CONDUCT OF BUSINESS.  Until the earlier of (i) the Effective 
Time or (ii) termination of this Agreement, each party will conduct its 
business only in the Ordinary Course of Business.

       9.29   CERTAIN ACTIONS.   Stockholder and DigiCourse shall have no 
obligation to consummate the Contemplated Transactions unless and until the 
I/O Board of Directors approves the following provision:  Prior to February 
1, 1999, I/O will not, without the written consent of Stockholder, take any 
action in furtherance of I/O being acquired by any Person (an "Acquisition") 
except an action that is required by Legal Requirements (other than under 
Contracts) of any Governmental Body.  I/O warrants and represents to 
Stockholder that I/O, its Board of Directors, management, or Representatives 
are not engaged in discussions with any Person concerning an Acquisition.  
Since January 1, 1998, I/O has taken no action in 

                                       42
<PAGE>

furtherance of an Acquisition.

       9.30   EXHIBITS.  References in this Agreement to Exhibits shall mean 
and refer to those Exhibits (except those Exhibits which are attached hereto) 
to be agreed upon by the parties and attached hereto and made a part hereof 
on or prior to October 15, 1998.  The parties shall use Reasonable Efforts to 
complete the Exhibits prior to October 15, 1998.  























                                       43
<PAGE>

        IN WITNESS WHEREOF, the parties have executed and delivered this 
Agreement as of the date first written above:

DIGICOURSE, INC.                                 I/O MARINE, INC.
a Louisiana Corporation                          a Louisiana Corporation


By:  /s/ ROY KELM                                By: /s/ W. J. ZERINGUE
   -------------------------------                  ---------------------------
       Director                                         Director


By: /s/ BARRY L. LACOUR                          By: /s/ AXEL M. SIGMAR
   -------------------------------                  ---------------------------
       Director                                         Director


By: /s/ JAMES M. LAPEYRE, JR.             
   -------------------------------                  
       Director


By: /s/ LAWRENCE P. OERTLING       
   -------------------------------                  
       Director


By: /s/ ROBBERT VORHOFF            
   -------------------------------                  
       Director



THE LAITRAM CORPORATION                          INPUT/OUTPUT, INC.
a Louisiana Corporation                          a Delaware Corporation



By: /s/ JAMES M. LAPEYRE, JR.                    By: /s/ W. J. ZERINGUE
   -------------------------------                  ---------------------------
   James M. Lapeyre, Jr., Chairman                   W. J. Zeringue, Chairman


                                       44
<PAGE>
                                       
                          CERTIFICATE OF SECRETARIES

       The undersigned Secretary of DigiCourse, Inc., a Louisiana 
corporation, and the undersigned Secretary of I/O Marine, Inc., a Louisiana 
corporation, each hereby certify with respect to the corporation of which 
they serve in such capacity that this Agreement has been approved by the sole 
shareholder of such corporation in the manner required by law.

Dated: September 30, 1998                  /s/ LAWRENCE P. OERTLING          
                                          -------------------------------------
                                            Lawrence P. Oertling, Secretary
                                            DigiCourse, Inc.
                                            a Louisiana Corporation



Dated: September 30, 1998                  /s/ CHRIS E. WOLFE
                                          -------------------------------------
                                            Chris E. Wolfe, Secretary
                                            I/O Marine, Inc.
                                            a Louisiana Corporation

       Pursuant to Section 112 of the Louisiana Business Corporation Law, the 
undersigned corporations have caused this Agreement and Plan of Merger to be 
executed by their respective presidents.

Dated: September 30, 1998                 DIGICOURSE, INC.


                                          By: /s/ ROY KELM                   
                                             ----------------------------------
                                             Name:  Roy Kelm
                                             Title: President


Dated: September 30, 1998                 I/O MARINE, INC.

                                          By: /s/ AXEL M. SIGMAR                
                                             ----------------------------------
                                             Name:  Axel M. Sigmar
                                             Title: President

                                       45
<PAGE>

                                ACKNOWLEDGMENT

STATE OF TEXAS

COUNTY OF HARRIS

       BE IT KNOWN, that on this 1st day of October, 1998, before me, the 
undersigned Notary, duly commissioned, qualified and sworn within and for the 
State and County aforesaid, personally came and appeared Axel M. Sigmar, 
appearing herein in his capacity as the President of I/O Marine, Inc., to me 
personally known to be the identical person whose name is subscribed to the 
foregoing instrument as the said officer of the said corporation, and 
declared and acknowledged to me, Notary, in the presence of the undersigned 
competent witnesses, that he executed the same on behalf of the said 
corporation with full authority of its Board of Directors, and that the said 
instrument is the free act and deed of the said corporation and was executed 
for the uses, purposes and benefits therein expressed.

WITNESS 1:                                PRESIDENT:


 /s/ CHRIS E. WOLFE                       /s/ AXEL M. SIGMAR   
- -------------------------                 ------------------------- 
                                          Axel M. Sigmar


WITNESS 2:    


 /s/ TERRY M. PRUITT        
- -------------------------                 


 /s/ MICHELLE LYLES  
- -------------------------                 
NOTARY PUBLIC

                                       46
<PAGE>

                                ACKNOWLEDGMENT


STATE OF LOUISIANA

PARISH OF JEFFERSON

       BE IT KNOWN, that on this 1st of October, 1998, before me, the 
undersigned Notary, duly commissioned, qualified and sworn within and for the 
State and Parish aforesaid, personally came and appeared Roy Kelm, appearing 
herein in his capacity as the President of DigiCourse, Inc., to me personally 
known to be the identical person whose name is subscribed to the foregoing 
instrument as the said officer of the said corporation, and declared and 
acknowledged to me, Notary, in the presence of the undersigned competent 
witnesses, that he executed the same on behalf of the said corporation with 
full authority of its Board of Directors, and that the said instrument is the 
free act and deed of the said corporation and was executed for the uses, 
purposes and benefits therein expressed.

WITNESSES:                                PRESIDENT:


 /s/ DEBORAH T. PRYPOLATO                 /s/ ROY KELM 
- -------------------------                 ------------------------- 
                                          Roy Kelm

 /s/ MARY T. BECENL         
- -------------------------                 


 /s/ FRED F. ZEPHER         
- -------------------------                 
NOTARY PUBLIC









                                       47

<PAGE>

                           REGISTRATION  RIGHTS  AGREEMENT

     THIS REGISTRATION RIGHTS AGREEMENT ("Agreement") is made and entered into
as of November 16, 1998, by and between Input/Output, Inc., a Delaware
corporation ("I/O" or the "Company"), and The Laitram Corporation, a Louisiana
corporation ("Stockholder").  I/O and Stockholder are each a "party" and
together the "parties" to this Agreement.

                                       RECITALS

     Stockholder, I/O, I/O Marine, Inc., a Louisiana corporation and 
wholly-owned subsidiary of I/O ("I/O Marine"), and DigiCourse, Inc., a 
Louisiana corporation ("DigiCourse") and wholly-owned subsidiary of 
Stockholder have entered into an Agreement and Plan of Merger dated as of 
September 30, 1998 ("Merger Agreement"), pursuant to which I/O Marine has 
been merged with and into DigiCourse and 100% of the issued and outstanding 
capital stock of DigiCourse has been converted into shares of I/O's common 
stock, par value $0.01 per share (the "Common Stock").

     As a result of the consummation of the transactions contemplated by the
Merger Agreement, the Stockholder owns 5,794,000 shares of Common Stock
("Shares").

     I/O wishes to grant the Stockholder certain registration rights in the
Shares.  

     NOW, THEREFORE, in consideration of the mutual promises and covenants that
follow, the parties agree as follows:

1.   CERTAIN DEFINITIONS.  Terms used in this Agreement shall have the following
meanings:

          "COMMISSION" means the Securities and Exchange Commission or any other
     federal agency at the time administering the Securities Act.  

          "REGISTRABLE SECURITIES" means (i) the Shares and any and all shares
     of Common Stock issued or issuable at any time or from time to time in
     respect of which I/O has previously or may in the future grant in writing
     registration rights (collectively, the "Registrable Common"); and (ii) any
     Common Stock issued or issuable at any time or from time to time in respect
     of the Shares or the Registrable Common upon a stock split, stock dividend,
     recapitalization or other similar event involving I/O; PROVIDED, HOWEVER,
     that shares of Common Stock which are Registrable Securities shall cease to
     be Registrable Securities upon any sale pursuant to a Registration
     Statement, Section 4(1) of the Securities Act or 


                                     -1-
<PAGE>

     Rule 144 under the Securities Act, or any sale in any manner to a person 
     or entity which, by virtue of Section 3.2 of this Agreement, is not 
     entitled to the rights provided by this Agreement.

          The terms "REGISTER," "REGISTERED", and "REGISTRATION" refer to a
     registration effected by preparing and filing a registration statement in
     compliance with the Securities Act, and the declaration or ordering by the
     Commission of the effectiveness of such registration statement.  

          "REGISTRATION EXPENSES" means all expenses, other than Selling
     Expenses (as defined below), incurred by I/O in complying with Section 2 of
     this Agreement, but excluding the compensation of regular employees of I/O
     which shall be paid in any event by I/O.  

          "SECURITIES ACT" means the Securities Act of 1933, as amended, or any
     similar federal statute and the rules and regulations promulgated by the
     Commission, all as in effect at the time.

          "SELLING EXPENSES" means only the underwriting discounts, selling
     commissions and stock transfer taxes applicable to the securities
     registered by the Stockholder and all fees and disbursements of counsel for
     the Stockholder.  

          "STOCKHOLDER" means The Laitram Corporation and any transferee
     pursuant to the terms of Section 3.2.

          "UNDERWRITTEN PUBLIC OFFERING" means a public offering in which the
     Common Stock is offered and sold on a firm commitment basis through one or
     more underwriters, all pursuant to an underwriting agreement to which I/O
     and the underwriters, among others, are parties.

2.   REGISTRATION RIGHTS.

     2.1  PIGGYBACK REGISTRATION.

          (a)  NOTICE OF REGISTRATION.  If at any time during the term of this
     Agreement, I/O registers any of its Common Stock for its own account or for
     the account of any other stockholders relating to an Underwritten Public
     Offering, I/O shall:

               (i)  promptly, but in any event at least twenty (20) days before
          I/O files a registration statement pursuant to an Underwritten Public


                                     -2-
<PAGE>

          Offering, give to the Stockholder written notice; and

               (ii) subject to Section 2.9 hereof, include in such registration
          (and any related blue sky laws qualification) the Registrable
          Securities as the Stockholder requests in a writing delivered to I/O
          within (ten) 10 days after receipt of I/O's written notice delivered
          pursuant to Section 2.1(a)(i) above.  I/O shall have no obligation to
          include in the registration any Registrable Securities of the
          Stockholder from whom a written request was not timely received. 
          Notwithstanding the forgoing to the contrary, in the event that the
          Stockholder requests inclusion of Registrable Securities in an
          Underwritten Public Offering prepared by I/O for the account of
          another stockholder, I/O shall only have the obligation to include
          such Registerable Securities, if any, as I/O shall have the right
          (contractual or otherwise) to include in such Underwritten Public
          Offering.

           (b) RIGHT TO TERMINATE REGISTRATION. I/O shall have the right to
     terminate or withdraw any registration initiated by I/O under this Section
     2.1 prior to the effectiveness of the registration whether the Stockholder
     has elected to include its Registrable Securities in the registration;
     PROVIDED, HOWEVER, that in such event, I/O shall promptly pay all
     reasonable out-of-pocket costs and expenses of the Stockholder incurred in
     connection with the terminated registration. 

     2.2  DEMAND REGISTRATIONS.  At any time from and after the effective date
of this Agreement and during the term of this Agreement, the Stockholder may
make up to two written requests for registration under the Securities Act,
pursuant to this Section 2.2 of all or part of its Registrable Securities (each
a "Demand Registration").  Each such request will specify the number of shares
of Registrable Securities proposed to be sold and will also specify the intended
method of disposition thereof.  The Company shall not be required to effect more
than two Demand Registrations pursuant to this Section 2.2, and each such Demand
Registration shall not be made for less than one million (1,000,000) shares of
Registrable Securities.  If a registration has become effective but is withdrawn
before completion of the offering contemplated thereby, then such registration
shall not count as either of the Demand Registrations contemplated by this
Section 2.2.    

          (a)  UNDERWRITTEN PUBLIC OFFERING.  If a Demand Registration is in the
     form of an underwritten offering, the Stockholder shall select the
     underwriter for such offering subject to the approval of the Company (which
     approval shall not be unreasonably withheld), and the Company shall enter
     into an underwriting agreement with such underwriter containing
     representations, warranties, 


                                     -3-
<PAGE>

     indemnities and agreements then customarily included by an issuer in 
     underwriting agreements with respect to secondary distributions.  The 
     Company shall not cause the registration under the Securities Act of any 
     other shares of its Common Stock to become effective (other than 
     registration of an employee stock plan, or registration in connection 
     with any Rule 145 or similar transaction) during the effectiveness of a 
     registration requested hereunder for an underwritten public offering if, 
     in the judgment of the underwriter or underwriters, such registration 
     would adversely affect the offering of the Registrable Securities 
     subject to the Demand Registration.

          (b)  INCLUSION OF ADDITIONAL SHARES.  The Company may include in a
     registration pursuant to this Section 2.2 securities for its own account or
     for the account of other third parties (including officers and employees of
     the Company), in amounts as determined by the Company's Board of Directors
     ("Additional Shares") so long as the inclusion thereof does not in any way
     exclude or otherwise impair the rights of the Stockholder who has requested
     registration pursuant to Section 2.2 above to include in such registration
     all Registrable Securities so requested.  Notwithstanding any other
     provision of this Agreement to the contrary, if the underwriter managing
     the offering determines that, because of marketing factors, all of the
     Registrable Securities and Additional Shares requested to be registered may
     not be included in the offering, then all or a portion of the Additional
     Shares shall be excluded to the extent so required by such limitation,
     prior to the exclusion, if any, of Registrable Securities of the
     Stockholder.  To facilitate the allocation of shares in accordance with the
     above provisions, the Company or the underwriters may round the number of
     shares allocated to any person to the nearest 100 shares.

     2.3  EXPENSES OF REGISTRATION.  All Registration Expenses incurred in
connection with registrations pursuant to (i) Section 2.1 piggyback
registrations shall be borne by I/O, and (ii) Section 2.2 demand registrations
shall be borne by the Stockholder.  All Selling Expenses relating to securities
registered on behalf of the Stockholder pursuant to Sections 2.1 and 2.2 shall
be borne by the Stockholder.

     2.4  I/O'S OBLIGATIONS IN REGISTRATION.  Whenever the Stockholder has
requested that any Registrable Securities be registered pursuant to this
Agreement, the Company will use its reasonable best efforts to effect the
registration and the sale of such Registrable Securities under the Securities
Act, as provided herein, and as expeditiously as possible:

     (a)  prepare and file with the Commission as soon as practicable but in no
event later than sixty (60) days after receipt of a request to file a
registration statement with 


                                     -4-
<PAGE>

respect to Registrable Securities, a registration statement on any form for 
which the Company then qualifies or which counsel for the Company shall deem 
appropriate and which form shall be available for the sale of such issue of 
Registrable Securities in accordance with the intended method of distribution 
thereof, and use its best efforts to cause such registration statement to 
become effective as promptly as practicable thereafter; PROVIDED, that if the 
Company shall furnish to the Stockholders a certificate signed by the Chief 
Executive Officer of the Company stating that in the good faith reasonable 
judgment of the Board of Directors it would be significantly disadvantageous 
to the Company and its stockholders for such a registration statement to be 
filed on or before the date filing would be required or to become effective, 
the Company shall have an additional period of not more than one-hundred 
fifty (150) days within which to file (or before which it requests the 
effectiveness of) such registration statement; and PROVIDED, FURTHER, that 
before filing a registration statement or prospectus or any amendments or 
supplements thereto, the Company will (i) furnish to counsel selected by each 
seller of Registrable Securities copies of all such documents proposed to be 
filed and (ii) notify each seller of Registrable Securities of any stop order 
issued or threatened by the Commission and take all actions required to 
prevent the entry of such stop order or to remove it if entered;

     (b)  prepare and file with the Commission such amendments and supplements
to such registration statement and the prospectus used in connection therewith
as may be necessary to keep such registration statement effective (and such
prospectus current as required by the Securities Act) for a period of not less
than 80 days or such shorter period which will terminate when all Registrable
Securities covered by such registration statement have been sold (but not before
the expiration of the applicable period referred to in Section 4(3) of the
Securities Act and Rule 174 thereunder, if applicable), and comply with the
provisions of the Securities Act with respect to the disposition of all
securities covered by such registration statement during such period in
accordance with the intended methods of disposition by the sellers thereof set
forth in such registration statement; 

     (c)  furnish to each seller of Registrable Securities to be included in a
registration statement copies of such registration statement as filed and each
amendment and supplement thereto (in each case including all exhibits thereto),
the prospectus included in such registration statement (including each
preliminary prospectus) and each amendment and supplement thereto and such other
documents as such seller may reasonably request in order to facilitate the
disposition of the Registrable Securities owned by such seller;

     (d)  use its reasonable best efforts to register or qualify such
Registrable Securities under such other securities or blue sky laws of such
jurisdictions as any seller 


                                     -5-
<PAGE>

reasonably requests and do any and all other acts and things which may be 
necessary or advisable to enable such seller to consummate the disposition in 
such jurisdictions of the Registrable Securities owned by such seller; 
PROVIDED, that the Company will not be required to (i) qualify generally to 
do business in any jurisdiction where it would not otherwise be required to 
qualify but for this Section 2.4(d), (ii) subject itself to taxation in any 
such jurisdiction or (iii) consent to general service of process in any such 
jurisdiction, but the Company will be required to consent to service of 
process in actions arising out of or in connection with the sale of the 
Registrable Securities or any violation of state securities laws;

     (e)  use its reasonable best efforts to cause the Registrable Securities
covered by such registration statement to be registered with or approved by any
other governmental agencies or authorities as may be necessary by virtue of the
business and operations of the Company to enable the seller or sellers thereof
to consummate the disposition of such Registrable Securities;

     (f)  enter into customary agreements (including an underwriting agreement
in customary form) and take such other actions as are required in order to
expedite or facilitate the disposition of such Registrable Securities; and

     (g)   cause all such Registrable Securities to be listed on each 
securities exchange on which similar securities issued by the Company are then
listed, provided that the applicable listing requirements are satisfied. 

     The Company may require each seller of Registrable Securities as to which
any registration is being effected to furnish to the Company such information
regarding matters relating to such seller's Registrable Securities as are
customary and as the Company may from time to time reasonably request in
writing.

     In addition, the management of I/O will, without unduly interfering with
the business and operations of I/O, cooperate to a commercially reasonable
degree in connection with any Stockholder request that Registrable Securities be
registered pursuant to this Agreement, including customary "road show"
presentations.

     2.5  INDEMNIFICATION.

           (a) To the extent permitted by law, I/O will indemnify and hold
     harmless Stockholder, each of its directors and officers and each person
     who controls Stockholder within the meaning of Section 15 of the Securities
     Act, with respect to registration, qualification or compliance which has
     been effected pursuant to this Agreement, against all expenses, claims,
     losses, actions, damages 


                                     -6-
<PAGE>

     or liabilities to the extent to which each such person is subject, 
     including any of the foregoing incurred in settlement of any litigation, 
     commenced or threatened, to the extent such expenses, claims, losses, 
     damages or liabilities (or proceedings in respect thereof) arise out of 
     or are based on any untrue statement (or alleged untrue statement) of a 
     material fact contained in any registration statement, prospectus, 
     offering circular or other document, or any amendment or supplement 
     thereto, incident to any such registration, qualification or compliance, 
     or arise out of or are based on any omission (or alleged omission) to 
     state therein a material fact required to be stated therein or necessary 
     to make the statements therein, in light of the circumstances in which 
     they were made, not misleading, or any violation by I/O of the 
     Securities Act or any rule or regulation promulgated under the 
     Securities Act applicable to I/O in connection with any such 
     registration, qualification or compliance, and I/O will reimburse the 
     indemnified persons, for any legal and any other expenses reasonably 
     incurred in connection with investigating, preparing or defending any 
     such claim, loss, damage, liability or action, PROVIDED, HOWEVER, that 
     the indemnity contained herein shall not apply to amounts paid in 
     settlement of any claim, loss, damage, liability or expense if 
     settlement is effected without the consent of I/O (which consent shall 
     not unreasonably be withheld); PROVIDED, FURTHER, that I/O will not be 
     liable in any such case to the extent that any such claim, loss, damage, 
     liability or expense arises out of or is based on any untrue statement 
     or omission or alleged untrue statement or omission, made in reliance 
     upon and in conformity with information furnished to I/O expressly for 
     inclusion in such registration by the Stockholder.  Notwithstanding the 
     foregoing, insofar as the foregoing indemnity relates to any such untrue 
     statement (or alleged untrue statement) or omission (or alleged 
     omission) made in the preliminary prospectus but eliminated or remedied 
     in the amended prospectus on file with the Commission at the time the 
     registration statement becomes effective or in the final prospectus 
     filed with the Commission pursuant to the applicable rules of the 
     Commission or in any supplement or addendum thereto, the indemnity 
     agreement herein shall not inure to the benefit of Stockholder if a copy 
     of the final prospectus filed pursuant to such rules, together with all 
     supplements and addenda thereto, was not furnished to the person or 
     entity asserting the loss, liability, claim or damage at or prior to the 
     time such furnishing is required by the Securities Act.

           (b) To the extent permitted by law, the Stockholder will, if
     securities held by the Stockholder are included in the securities as to
     which the registration, qualification or compliance is being effected
     pursuant to the terms of this Agreement, indemnify and hold harmless I/O,
     each of its directors and officers, each person who controls I/O within the
     meaning of Section 15 of the Securities Act, and each other person selling
     I/O's securities covered by such registration 


                                     -7-
<PAGE>

     statement, each of such person's officers and directors and each person 
     controlling such persons within the meaning of Section 15 of the 
     Securities Act, against all claims, losses, damages and liabilities (or 
     actions in respect thereof) to the extent to which such person or entity 
     is subject, arising out of or based on any untrue statement (or alleged 
     untrue statement) of a material fact contained in any such registration 
     statement, prospectus, offering circular or other document, or arising 
     out of or based on any omission (or alleged omission) to state therein a 
     material fact required to be stated therein or necessary to make the 
     statements therein not misleading, or any violation by the Stockholder 
     of any rule or regulation promulgated under the Securities Act 
     applicable to the Stockholder and relating to action or inaction 
     required of the Stockholder in connection with any such registration, 
     qualification or compliance, and will reimburse I/O, such other persons, 
     such directors, officers, persons or control persons for any legal or 
     other expenses reasonably incurred in connection with investigating or 
     defending any such claim, loss, damage, liability or action, in each 
     case to the extent, but only to the extent, that such untrue statement 
     (or alleged untrue statement) or omission (or alleged omission) is made 
     in such registration statement, prospectus, offering circular or other 
     document in reliance upon and in conformity with information furnished 
     to I/O by the Stockholder expressly for inclusion in such registration; 
     PROVIDED, HOWEVER, that the indemnity contained herein shall not apply 
     to amounts paid in settlement of any claim, loss, damage, liability or 
     expense if settlement is effected without the consent of the Stockholder 
     (which consent shall not be unreasonably withheld). Notwithstanding the 
     foregoing, the liability of the Stockholder under this subsection (b) 
     shall be limited in an amount equal to the net proceeds from the sale of 
     the Shares sold by the Stockholder, unless such liability arises out of 
     or is based on intentional misconduct or an intentional omission by the 
     Stockholder, in which case such limitation shall not apply.

          (c)  Each party entitled to indemnification under this Section 2.5
     (the "Indemnified Party") shall give notice to the party required to
     provide indemnification (the "Indemnifying Party") promptly after such
     Indemnified Party has actual knowledge of any action or proceeding
     commenced against, or written demand made on any such party in respect of
     which indemnity may be sought, and shall permit the Indemnifying Party to
     assume the defense of any such claim or any litigation resulting therefrom,
     provided that counsel for the Indemnifying Party, who shall conduct the
     defense of such claim or litigation, shall be approved by the Indemnified
     Party (whose approval shall not unreasonably be withheld), and the
     Indemnified Party may participate in such defense at such party's expense,
     and provided further that the failure of any Indemnified Party to give
     notice as provided herein shall not relieve the 


                                     -8-
<PAGE>

     Indemnifying Party of its obligations under this Agreement unless the 
     failure to give such notice is materially prejudicial to an Indemnifying 
     Party's ability to defend such action and provided further, that the 
     Indemnifying Party shall not assume the defense for matters as to which 
     there is a conflict of interest or as to which the Indemnifying Party is 
     asserting separate or different defenses, which defenses are 
     inconsistent with the defenses of the Indemnified Party. No Indemnifying 
     Party, in the defense of any such claim or litigation, shall, except 
     with the consent of each Indemnified Party, consent to entry of any 
     judgment or enter into any settlement which does not include as an 
     unconditional term the giving by the claimant or plaintiff to such 
     Indemnified Party of a release from all liability in respect to such 
     claim or litigation. No Indemnified Party shall consent to entry of any 
     judgment or enter into any settlement without the consent of each 
     Indemnifying Party.

          (d)  If the indemnification provided for in this Section 2.5 is
     unavailable to an Indemnified Party in respect of any otherwise indemnified
     losses, claims, damages or liabilities, then each Indemnifying Party, in
     lieu of indemnifying such Indemnified Party, shall contribute to the amount
     paid or payable by such Indemnified Party as a result of such losses,
     claims, damages or liabilities in such proportion as is appropriate to
     reflect the relative fault of I/O on the one hand and the Stockholder on
     the other in connection with the statements or omissions which resulted in
     such losses, claims, damages or liabilities, as well as any other relevant
     equitable considerations. The relative fault of I/O on the one hand and the
     Stockholder on the other shall be determined by reference to, among other
     things, whether the untrue or alleged untrue statement of material fact or
     the omission or alleged omission to state a material fact relates to
     information supplied by I/O or by the Stockholder and the parties' relevant
     intent, knowledge, access to information and opportunity to correct or
     prevent such statement or omission. I/O and the Stockholder agree that it
     would not be just and equitable if contribution pursuant to this Section
     2.5(d) were based solely upon the number of entities from whom contribution
     was requested or by any other method of allocation which does not take
     account of the equitable considerations referred to above in this Section
     2.5(d). The amount paid or payable by an Indemnified Party as a result of
     the losses, claims, damages and liabilities referred to above in this
     Section 2.5(d) shall be deemed to include any legal or other expenses
     reasonably incurred by such Indemnified Party in connection with
     investigating or defending any such action or claim, subject to the
     provisions of Section 2.5(c) hereof.  No person guilty of fraudulent
     misrepresentation (within the meaning of Section 11(f) of the Securities
     Act) shall be entitled to contribution from any person who was not guilty
     of such fraudulent misrepresentation (within the meaning of Section 11(f)
     of the Securities Act).


                                     -9-
<PAGE>

     2.6  CERTAIN INFORMATION.  The Stockholder agrees, with respect to any
Registrable Securities included in any registration, to furnish to I/O that
information regarding the Stockholder, the Registrable Securities and the
distribution proposed by the Stockholder as I/O may reasonably request in
writing and as shall be required in connection with any registration,
qualification or compliance.

     2.7  "LOCK-UP" AGREEMENT.  With respect to any registration under Section
2.1, the Stockholder, if requested by I/O and/or the managing underwriter of
Common Stock or other securities of I/O, shall agree not to sell or otherwise
transfer or dispose of any Registrable Securities or other securities of I/O
held by the Stockholder within 14 days prior to, and for a specified period of
time (not to exceed 120 days) following, the effective date of a registration
statement.  Such agreement shall be in writing in a form reasonably satisfactory
to the Stockholder, I/O and such underwriter.  I/O may impose stop transfer
instructions with respect to the Registrable Securities or other securities
subject to the foregoing restriction until the end of the lock-up period.

     2.8  RULE 144 REPORTING. With a view to making available the benefits of
certain rules and regulations of the Commission which may at any time permit the
sale of the Restricted Securities ("Restricted Securities" is defined for
purposes of this Agreement as defined in Rule 144 under the Securities Act) to
the public without registration, I/O agrees, during the term of this Agreement,
to use its best lawful efforts to:

          (a)  Make and keep public information available, as those terms are
     understood and defined in Rule 144 under the Securities Act, at all times
     during which I/O is subject to the reporting requirements of the Securities
     Exchange Act of 1934, as amended (the "Exchange Act");  

          (b)  File with the Commission in a timely manner all reports and other
     documents required of I/O under the Securities Act and the Exchange Act (at
     all times during which I/O is subject to such reporting requirements); and

          (c)  So long as the Stockholder owns any Restricted Securities, to
     furnish to the Stockholder upon request a written statement by I/O as to
     its compliance with the reporting requirements of Rule 144 and with regard
     to the  Securities Exchange Act of 1934 (at all times during which I/O is
     subject to such reporting requirements), a copy of the most recent annual
     or quarterly report of I/O, and such other reports and documents of I/O and
     other information in the possession of or reasonably obtainable by I/O as
     the Stockholder may reasonably request in availing itself of any rule or
     regulation of the Commission allowing the Stockholder to sell securities
     without registration.


                                    -10-
<PAGE>

     2.9  UNDERWRITING.  The right of the Stockholder to registration under this
Agreement under Section 2.1 shall be conditioned upon the Stockholder's
participation in the underwriting.  The inclusion of Stockholder's Registrable
Securities in the underwriting may be limited.  The Stockholder shall (together
with I/O and the other holders distributing their securities through the
underwriting) enter into an underwriting agreement in customary form with the
managing underwriter(s) selected for the underwriting by I/O.  If the managing
underwriter(s) determines that marketing factors require a limitation of the
number of shares to be underwritten, the managing underwriter(s) may limit some
or all of the Registrable Securities that may be included in the registration
and underwriting as follows: the number of Registrable Securities that may be
included in the registration and underwriting by the Stockholder shall be
determined by multiplying the number of shares of Registrable Securities of all
selling stockholders of I/O which the managing underwriter(s) is willing to
include in the registration and underwriting, times a fraction, the numerator of
which is the number of Registrable Securities requested to be included in the
registration and underwriting by the Stockholder, and the denominator of which
is the total number of Registrable Securities which all selling stockholders of
I/O have requested to have included in the registration and underwriting.  I/O
may round the number of shares allocable to any such person to the nearest 100
shares.

3.   MISCELLANEOUS.

     3.1  GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED IN ALL RESPECTS BY THE
INTERNAL LAWS OF THE STATE OF DELAWARE.

     3.2  NO TRANSFER; TERMINATION. These registration rights are not
transferable, except by operation of law, and shall not inure to the benefit of
any person other than the Stockholder; PROVIDED, HOWEVER, that the Stockholder
may transfer the registration rights granted hereunder or any portion thereof to
any transferee who (i) holds 1,000,000 or more Registerable Securities after
giving effect to such transaction and (ii) agrees to be bound by the terms and
conditions of this Agreement and signs an addendum to this agreement to such
effect. After such a transfer, both the Stockholder and each such transferee
shall be entitled to the notice provided in Section 2.1 and the piggyback rights
provided in Section 2, including piggyback rights upon the registration of
Registrable Securities as a result of a Demand Registration pursuant to Section
2.2.  The rights and provisions of this Agreement shall terminate on the
earliest to occur of (i) such time as the Stockholder remains an "affiliate" of
the Company under Rule 144 and can sell its remaining Registrable Securities
under Rule 144 within any three (3) month period or (ii) such time as the
Stockholder ceases to be an "affiliate" of the Company under Rule 144 and all of
its Registrable Securities may be sold pursuant to 


                                    -11-
<PAGE>

Rule 144(k) under the Securities Act.

     3.3  ENTIRE AGREEMENT; AMENDMENT. This Agreement constitutes the full and
entire understanding and agreement between the parties with regard to the
Agreement's subject matter.  Any provision of this Agreement may be amended,
waived, discharged or terminated only upon the written consent of I/O and
Stockholder.
          
     3.4  NOTICES.   All notices or other communications which are required or
may be given under this Agreement shall be in writing and shall be deemed to
have been duly given when delivered in person, transmitted by telecopier and
confirmed, or mailed by registered or certified first class mail, postage
prepaid, return receipt requested to the parties hereto at the address set forth
below (as the same may be changed from time to time by notice similarly given)
or the last known business or residence address of such other person as may be
designated by either party hereto in writing.

          If to the Stockholder:

          The Laitram Corporation
          220 Laitram Lane
          Harahan, La. 70123
          Attention: General Counsel
     
          If to I/O:

          Input/Output, Inc.
          11104 West Airport Blvd., Suite 200
          Stafford, Texas 77477
          Attention: General Counsel

     3.5  DELAYS OR OMISSIONS. Except as expressly provided herein, no delay or
omission to exercise any right, power or remedy accruing to any party to this
Agreement shall impair any such right, power or remedy of such party nor shall
it be construed to be a waiver of any such breach or default, or an acquiescence
therein, or of or in any similar breach or default thereafter occurring; nor
shall any waiver of any single breach or default be deemed a waiver of any other
breach or default theretofore or thereafter occurring. Any waiver, permit,
consent or approval of any kind or character on the part of any party of any
breach or default under this Agreement, or any waiver on the part of any party
of any provisions or conditions of this Agreement, must be in writing and shall
be effective only to the extent specifically set forth in such writing. All
remedies either under this Agreement or by law or otherwise afforded to any
party to this Agreement, shall be cumulative and not alternative.


                                    -12-
<PAGE>

     3.6  COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be enforceable against the parties actually
executing such counterparts, and all of which together shall constitute one
instrument.

     3.7  SEVERABILITY. In the event that any provision of this Agreement
becomes or is declared by a court of competent jurisdiction to be illegal,
unenforceable or void, this Agreement shall continue in full force and effect
without said provision.

     3.8  TITLES AND SUBTITLES. The titles and subtitles used in this Agreement
are used for convenience only and are not considered in construing or
interpreting this Agreement.

     3.9  NO THIRD PARTY RIGHTS.  Except as otherwise provided in Sections 2.5
and 3.2, this Agreement shall not create benefits on behalf of any Person who is
not a party to this Agreement, and this Agreement shall be effective only as
between the parties hereto, their successors and permitted assigns.


                                    -13-
<PAGE>

     IN WITNESS WHEREOF, the undersigned or each of their respective duly
authorized officers or representatives have executed this agreement effective
upon the date first set forth above.


                                       INPUT/OUTPUT, INC.


                                       By: /s/ ZEKE ZERINGUE
                                           ------------------------------------
                                               Zeke Zeringue, Chairman


                                       THE LAITRAM CORPORATION


                                       By: /s/ JAMES M. LAPEYRE, JR.
                                           ------------------------------------
                                               James M. Lapeyre, Jr., Chairman








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