Document:

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                                                                   EXHIBIT 10.49

THIS SECURED PROMISSORY NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
1933, AS AMENDED, OR ANY STATE SECURITIES LAWS (COLLECTIVELY, THE "ACTS"), AND
MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED, ASSIGNED OR DISPOSED OF
EXCEPT PURSUANT TO REGISTRATION UNDER SUCH ACTS OR UNLESS THE CORPORATION HAS
RECEIVED AN OPINION OF COUNSEL, OR OTHER EVIDENCE REASONABLY SATISFACTORY TO THE
CORPORATION, THAT SUCH REGISTRATION IS NOT REQUIRED.

                             SECURED PROMISSORY NOTE

$8,000,000.00                      Orem, Utah                    _________, 2001

                  FOR VALUE RECEIVED, the undersigned, Caldera International,
Inc., a Delaware corporation ("Borrower"), promises to pay to The Santa Cruz
Operation, Inc., a California Corporation ("Lender"), the sum of Eight Million
Dollars ($8,000,000.00) in lawful money of the United States of America. Other
than as provided below with respect to past due principal amounts, no interest
shall accrue or be payable under this promissory note (this "Note"). Subject to
applicable deductions described below, the principal of this Note shall be due
and payable in four consecutive quarterly installments of $2 million each, with
the first such installment due on the first day of the fifth, full Caldera
Fiscal Quarter following the Effective Date. This note is a full recourse note
with respect to the Borrower.

                  All terms not otherwise defined herein shall have the meanings
ascribed to them in that certain Agreement and Plan of Reorganization, dated
August 1, 2000, among the Lender, the Borrower and Caldera Systems, Inc. (as
amended, the "Reorganization Agreement").

                  Payment of this Note is secured by a Security Agreement
executed on this date by Borrower and covering all of the assets of Borrower
relating to Borrower's OpenServer Business. If action is instituted to collect
this note, the Borrower promises to pay all costs and expenses, including
reasonable attorneys' fees, incurred in connection with such actions.

                  All past due principal and accrued interest on this Note shall
bear interest from maturity until paid at the lesser of (i) the rate of 10% per
annum or (ii) the highest rate for which Borrower may legally contract under
applicable law. All payments on past due principal and accrued interest
hereunder shall be payable in lawful money of the United States of America which
shall be legal tender for public and private debts at the time of payments.

1. Right of Offset and Reduction. The principal amount of this Note shall be
reduced by an amount (the "Reduction Amount") equal to the sum of (i) all Commit
Transaction Receivables for which payment has not been received prior to the
one-year anniversary of the Effective Time, plus (ii) 50% of Borrower's costs
(excluding internal, employee costs) in collecting Commit Transaction
Receivables during the period beginning on the Effective Time

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and ending on the one-year anniversary of the Effective Time; provided that if
Borrower forgives payment under or replaces any Commit Transaction Receivables
without Lender's consent, no deduction relating to the non-payment of such
forgiven or replaced Commit Transaction Receivables will be allowed. Borrower
agrees to use commercially reasonable business practices in collecting the
Commit Transaction Receivables. The Reduction Amount shall be applied first
against the initial installment payment under this Note and then, to the extent
necessary, shall be applied against the second, third and/or fourth installment
payments, in that order.

2. Prepayments. This Note may be prepaid by Borrower in whole or in part without
the consent of the holder and without prepayment penalty of any kind.

3. Default; Remedies. The entire unpaid balance of this Note shall be
immediately due and payable at the option of the holder hereof upon the
occurrence of an Event of Default. For the purposes of this Agreement, an Event
of Default shall have occurred if (i) the Borrower shall have materially failed
to perform any covenant or other obligation hereunder, and such failure shall
have continued for twenty (20) days after Borrower shall have received notice
thereof, (ii) the Borrower shall commence a voluntary case or other proceeding
seeking liquidation or other reorganization with respect to itself or its debts
under any bankruptcy, insolvency or other similar law now or hereafter in effect
or seeking the appointment of a trustee, receiver, liquidator, custodian or
other similar official of it or any substantial part of its property, or shall
make a general assignment for the benefit of creditors, or shall fail generally
to pay its debts as they become due; or (iii) an involuntary case or other
proceeding shall be commenced against the Borrower seeking liquidation,
reorganization or other relief with respect to it or its debts under any
bankruptcy, insolvency or other similar law now or hereafter in effect or
seeking the appointment of a trustee, liquidator, receiver, custodian or other
similar official of it or any substantial part of its property, and such
involuntary case or other proceeding shall remain undismissed and unstayed for a
period of 90 consecutive days.

4. No Waiver; Cumulative Rights. No delay on the part of the holder of this Note
in the exercise of any power or right under this Note or under any other
instrument executed pursuant hereto shall operate as a waiver thereof, nor shall
a single or partial exercise of any power or right preclude other or further
exercise thereof or the exercise of any other power or right.

6. Waiver. Borrower and all endorsers, sureties and guarantors of this Note
waive demand, presentment, protest, notice of dishonor, notice of nonpayment,
notice of intention to accelerate, notice of acceleration, notice of protest and
any and all lack of diligence or delay in collection or the filing of suit
hereon which may occur, and agree to all extensions and partial payments, before
or after maturity, without prejudice to the holder hereof.

7. Collection Costs. In the event that, upon an Event of Default, any amount
under this Note is collected in whole or in part through suit, arbitration or
mediation, then and in any such case there shall be added to the unpaid
principal balance hereof all costs of collection, (including, but not limited
to, reasonable attorneys' fees and expenses) whether or not suit is filed.

8. Governing Law. This Note shall be governed by and construed in accordance
with the laws of the State of California.

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9. Venue. The parties agree that any dispute regarding the interpretation or
validity of, or otherwise arising out of this Note, shall be subject to the
exclusive jurisdiction of the California State Courts in and for Santa Clara
County, California or, in the event of federal jurisdiction, the United States
District Court for the Northern District of California sitting in Santa Clara
County, California, and each party hereby agrees to submit to the personal and
exclusive jurisdiction and venue of such courts and not to seek the transfer of
any case or proceeding out of such courts.

10. Headings. The headings of the sections of this Note are inserted for
convenience of reference only and shall not be deemed to constitute a part
hereof.

11. Usury. All agreements between Borrower and the holder of this Note, whether
now existing or hereafter arising and whether written or oral, are expressly
limited so that in no contingency or event whatsoever, whether by acceleration
of the maturity of this Note or otherwise, shall the amount paid, or agreed to
be paid, to the holder hereof for the use, forbearance or detention of the money
to be loaned hereunder or otherwise, exceed the maximum amount permissible under
applicable law. If from any circumstances whatsoever fulfillment of any
provision of this Note or of any other document evidencing, securing or
pertaining to the indebtedness evidenced hereby, at the time performance of such
provision shall be due, shall involve transcending the limit of validity
prescribed by law, then ipso facto, the obligation to be fulfilled shall be
reduced to the limit of such validity, and if from any such circumstances the
holder of this Note shall ever receive anything of value as interest or deemed
interest by applicable law under this Note or any other document evidencing,
securing or pertaining to the indebtedness evidenced hereby or otherwise an
amount that would exceed the highest lawful rate, such amount that would be
excessive interest shall be applied to the reduction of the principal amount
owing under this Note or on account of any other indebtedness of Borrower to the
holder hereof relating to this Note, and not to the payment of interest, or if
such excessive interest exceeds the unpaid balance of principal of this Note and
such other indebtedness, such excess shall be refunded to Borrower. In
determining whether or not the interest paid or payable with respect to any
indebtedness of Borrower to the holder hereof, under any specific contingency,
exceeds the highest lawful rate, Borrower and the holder hereof shall, to the
maximum extent permitted by applicable law, (i) characterize any nonprincipal
payment as an expense, fee or premium rather than as interest, (ii) amortize,
prorate, allocate and spread the total amount of interest throughout the full
term of such indebtedness so that the actual rate of interest on account of such
indebtedness is uniform throughout the term thereof, and/or (iii) allocate
interest between portions of such indebtedness, to the end that no such portion
shall bear interest at a rate greater than that permitted by law. The terms and
provisions of this paragraph shall control and supersede every other conflicting
provision of all agreements between Borrower and the holder hereof.

12. Successors and Assigns. All of the stipulations, promises and agreements in
this Note made by or on behalf of Borrower shall bind the successors and assigns
of Borrower, whether so expressed or not, and inure to the benefit of the
successors and assigns of Borrower and Lender. Any assignee of Borrower or
Lender shall agree in writing prior to the effectiveness of such assignment to
be bound by the provisions hereof. Borrower shall not assign this Note or any of

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its rights, interests or obligations under this Note to any third party, other
than by operation of law, without Lender's written consent, which shall not be
unreasonably withheld.

13. Severability. In the event any one or more of the provisions contained in
this Note shall for any reason be held to be invalid, illegal or unenforceable
in any respect, such invalidity, illegality or unenforceability shall not affect
any other provision hereof, and this Note shall be construed as if such invalid,
illegal or unenforceable provision had never been contained herein.

14. Notices. All notices and other communications hereunder shall be in writing
or by telex, telegram or telecopy, and shall be deemed to have been duly made
when delivered in person or sent by telex, telegram, telecopy, same day or
overnight courier, or 72 hours after having been deposited in the United States
first class or registered or certified mail return receipt requested, postage
prepaid, to a party at the address set forth below (which may be changed in
accordance with these notice procedures):

         If to Lender:

                  The Santa Cruz Operation, Inc.
                  425 Encinal
                  Santa Cruz, California 95061-1900
                  Attention: Law and Corporate Affairs
                  Fax:  (831) 427-5454

         with a copy (which shall not constitute notice) to:

                  Wilson Sonsini Goodrich & Rosati
                  650 Page Mill Road
                  Palo Alto, CA 94304-1050
                  Attention: Michael Danaher
                  Fax:  (650) 493-6811

         If to Borrower:

                  Caldera Systems, Inc.
                  240 West Center Street
                  Orem, Utah 84057
                  Attention: Chief Executive Officer
                  Fax:  (801) 765-1313

         with a copy (which shall not constitute notice) to:

                  Brobeck, Phleger & Harrison LLP
                  370 Interlocken Boulevard, Suite 500
                  Broomfield, Colorado 80021
                  Attention: John E. Hayes, III
                  Fax: (303) 410-2199

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                  IN WITNESS WHEREOF, the undersigned has executed this Secured
Promissory Note on and as of the date first set forth above.

                                        CALDERA INTERNATIONAL, INC.

                                        By:
                                            ------------------------------------

AGREED AND ACCEPTED:

THE SANTA CRUZ OPERATION, INC.

By:
    --------------------------------

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                                                                   EXHIBIT 10.50

                               SECURITY AGREEMENT

         This Security Agreement, (as amended, modified or otherwise
supplemented from time to time, this "AGREEMENT"), is made and entered into as
of ___________, 2001 by and between Caldera International, Inc., a Delaware
corporation, with principal offices at 240 West Center Street, Orem, Utah 84057
("DEBTOR"), and The Santa Cruz Operation, Inc., a California corporation with
principal offices at 425 Encinal, Santa Cruz, California 95061 ("SECURED
PARTY").

                                     RECITAL

         In connection with the execution of the Secured Promissory Note of even
date herewith (the "NOTE") and as security for its obligations under the Note,
Debtor has agreed, among other things, to grant Secured Party a security
interest in the Collateral (as defined below) on the terms set forth in this
Agreement.

                                    AGREEMENT

         NOW, THEREFORE, in consideration of the foregoing recitals, and for
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the parties hereto hereby agree as follows:

         1. DEFINED TERMS. All capitalized terms used in this Agreement that are
listed on Exhibit A attached hereto (which is incorporated by this reference)
will have the meanings indicated thereon. Unless otherwise defined herein, all
other capitalized terms used in this Agreement will have the same meanings given
to such terms in the Note and/or in that certain Agreement and Plan of
Reorganization, dated August 1, 2000, among the Secured Party, the Debtor and
Caldera Systems, Inc., (as amended, the "Reorganization Agreement").

         2. GRANT OF SECURITY INTEREST; COLLATERAL ASSIGNMENT. As collateral
security for the prompt and complete payment and performance when due (whether
at the stated maturity, by acceleration or otherwise) of the Obligations, and
subject to Prior Liens, Debtor hereby grants to Secured Party a first priority
security interest in the following assets of Debtorrelating to the OpenServer
Business, which assets are collectively referred to herein as the "COLLATERAL":

                  (a) General Intangibles. All of Debtor's General Intangibles
directly relating to the OpenServer Business, now existing or hereafter arising
or acquired, together with the proceeds therefrom. As used herein, the term
"GENERAL INTANGIBLES" means all personal property (including things in action)
other than goods, accounts, chattel paper, documents, instruments, and money,
and includes, but is not limited to, business records, deposit accounts,
inventions, Intellectual Property, designs, patents, patent applications, patent
rights, trademarks, trademark applications, trademark registrations, service
marks, service mark applications, service registrations, trade names, goodwill,
technology, know-how, confidential information, trade secrets, customer lists,
supplier lists, copyrights, copyright applications, copyright registrations,
licenses, permits, franchises, tax refund claims, and any letters of credit,
guarantee claims,

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security interests, or other security held by Debtor to secure any "ACCOUNTS"
(as hereinafter defined).

                  (b) Accounts (including Accounts Receivable). All of Debtor's
Accounts directly relating to the OpenServer Business, whether now existing or
hereafter arising or acquired, together with the proceeds therefrom. As used
herein, the term "ACCOUNTS" means any right of Debtor to receive payment from
another person or entity, including payment for goods sold or leased, or for
services rendered, no matter how evidenced or arising, and regardless of whether
yet earned by performance. It includes, but is not limited to, accounts,
accounts receivable, contract rights, contracts receivable, purchase orders,
notes, drafts, acceptances, all rights to payment earned or unearned under a
charter or other contract involving the use or hire of a vessel and all rights
incident to the charter or contract, and other forms of obligations and
receivables.

                  (c) Inventory. All of Debtor's Inventory directly relating to
the OpenServer Business, whether now owned or hereafter acquired, together with
the products and proceeds there from and all packaging, manuals, and
instructions related thereto. As used herein, the term "INVENTORY" means all
goods, merchandise, and personal property held for sale or lease or furnished or
to be furnished under contracts of service, and all raw materials, work in
process, or materials used or consumed in Debtor's business, wherever located
and whether in the possession of Debtor, a warehouseman, a bailee, or any other
person.

                  (d) Chattel Paper, Documents and Instruments. All of Debtor's
right, title, and interest in any chattel paper, documents, or instruments, now
owned or hereafter acquired or arising, or now or hereafter coming into the
possession, control, or custody of either Debtor or Secured Party, in each case
directly relating to or arising from the OpenServer Business, together with all
proceeds there from. The terms "chattel paper," "documents," and "instruments"
shall have those meanings ascribed to them in the California Uniform Commercial
Code.

                  (e) Excluded Assets. Notwithstanding the foregoing, in no
event shall Collateral include, and Secured Party shall not be deemed to have an
interest in, any of Debtor's right, title or interest (a) in any Intellectual
Property if the grant of such interest shall constitute or result in the
abandonment, invalidation or rendering unenforceable any right, title or
interest of Debtor therein, (b) in any license, contract or agreement to which
Debtor is a party or any of its rights or interests thereunder to the extent,
but only to the extent, that such a grant would, under the terms of such
license, contract or agreement, or otherwise, result in a breach or termination
of the terms or, constitute a default under or termination of, any such license,
agreement or contract (other than to the extent that any such term would be
rendered ineffective pursuant to the Uniform Commercial Code of any relevant
jurisdiction, and any other applicable law or principles of equity); provided
that immediately upon the ineffectiveness, lapse or termination of any such
provision, the Collateral shall include, and Debtor shall be deemed to have
granted a security interest in, all such rights and interests as if such
provision had never been in effect, and (c) in any of the outstanding capital
stock of a controlled foreign corporation, as such term is defined in the
Internal Revenue Code of 1986, as amended, in excess of 65% of the voting power
of all classes of capital stock of such controlled foreign corporation entitled
to vote.

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         3. REPRESENTATIONS AND WARRANTIES. Debtor hereby represents and
warrants to Secured Party that:

                  (a) Title; No Other Liens. Except for (i) the liens granted to
Secured Party pursuant to this Agreement, (ii) the Prior Liens and (iii) the
Permitted Liens, Debtor owns (and, in the case of after-acquired Collateral,
will own at the time it is acquired) all right, title and interest in and to
each item of the Collateral free and clear of any and all liens, claims,
security interests, encumbrances and restrictions of any kind. No security
agreement, financing statement or other public notice with respect to all or any
part of the Collateral is on file or of record in any public office, except such
as may have been filed in favor of Secured Party pursuant to this Agreement, and
except such as may have been filed with respect to the Prior Liens or the
Permitted Liens.

                  (b) No Consents. Debtor has all right, power and authority
necessary to grant Secured Party the security interest granted in Section 2
above, without the need for the consent or approval of any third party other
than consents or approvals that have been obtained.

                  (c) Location of Collateral. The Collateral (other than the
Intellectual Property) is located and will at all times be kept at Debtor's
office at the address indicated above, and such other premises owned or leased
by Debtor.

         4. COVENANTS. Debtor covenants and agrees with Secured Party that, from
and after the date of this Agreement until all Obligations are paid in full and
satisfied:

                  (a) Further Documentation. Upon Secured Party's written
request and at Debtor's sole expense, Debtor will promptly and duly execute and
deliver such further instruments and documents and take such further action as
Secured Party may reasonably request for the purpose of obtaining, giving notice
of, protecting, preserving and perfecting the security interests granted under
this Agreement, including, without limitation, the filing of any financing or
continuation statements under the Code in effect in any jurisdiction with
respect to the security interests created hereby and the recording of the
security interests granted hereunder in any Intellectual Property with the
appropriate governmental or other authorities in any jurisdiction. Debtor agrees
that a carbon, photographic or other reproduction of this Agreement (or, if
appropriate, any other Security Document) will be sufficient as a financing
statement for filing in any jurisdiction, if permitted by such jurisdiction.

                  (b) Maintenance of Records. Debtor will keep and maintain
complete records of the Collateral as it does in the ordinary course of
business. For Secured Party's further security, Secured Party will have a
security interest in all of the books and records of Debtor pertaining to the
Collateral.

                  (c) No Liens on Collateral. Debtor will not create, incur or
permit to exist, will defend the Collateral against, and will take such other
action as is necessary to remove, any lien, claim, security interest or
encumbrance on or to any of the Collateral, other than the liens granted to
Secured Party under this Agreement and Permitted Liens.

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                  (d) Limitation on Dispositions of Collateral. Debtor will use
all commercially reasonable efforts to preserve the Collateral without material
impairment while conducting its business in the ordinary course in a manner that
is consistent with Debtor's past business practices or Lender's past business
practices as historical owner and operator of the OpenServer Business. Debtor
will not, through any license, encumbrance, assignment, transfer or disposition
of any of the Collateral, any creation of obligations of Debtor, any issuance of
securities, or any other action, (i) avoid or seek to avoid the observation or
performance of any of the terms to be observed or performed by Debtor under this
Agreement, (ii) materially impair the benefit of this Agreement or the
Collateral to Secured Party, or (iii) materially and adversely affect Secured
Party's ability to operate, or obtain the financial or economic benefit of, the
Collateral in accordance with the terms of this Agreement; provided, however,
that Debtor may enter into Licenses with third parties in the ordinary course of
its business and consistent with past licensing practice of Intellectual
Property owned or licensed by Debtor or by Lender as historical owner and
operator of the OpenServer Business. Debtor will at all times in good faith
take, and assist in taking, all such action as may be necessary or appropriate
to protect Secured Party's rights under this Agreement from impairment and to
preserve for Secured Party's benefit the value of the Collateral.

                  (e) No Change in Location, Name, etc. Except upon thirty (30)
days prior written notice to Secured Party, Debtor will not move the Collateral
(other than the Intellectual Property) from the location specified in Section
3(c) above or change Debtor's name, identity or structure to such an extent that
any financing statement or other Security Documents filed by Secured Party would
become misleading.

                  (f) Payment of Taxes and Assessments. Debtor will pay prior to
delinquency all taxes and assessments assessed against, levied upon or placed
against the Collateral, other than taxes and assessments being contested in good
faith and by appropriate proceedings, and for which adequate reserves are
maintained on the books of the Debtor in accordance with GAAP.

         5. SECRECY AND ASSIGNMENT OF INTELLECTUAL PROPERTY. Debtor will use
commercially reasonable efforts to ensure that each current and future employee
and contractor hired or engaged by Debtor who receives trade secrets or other
confidential and proprietary information of Debtor and/or who in the course of
his/her employment or engagement with Debtor is involved in any way whatsoever
with the Intellectual Property executes and delivers to Debtor a Debtor's
employee or contractor invention assignment and confidentiality agreement, in
Debtor's customary form, imposing invention and intellectual property rights
assignment obligations and confidentiality obligations on the part of such
employee or contractor to Debtor. Debtor will further take reasonable steps and
procedures to preserve and protect the secrecy of Debtor's trade secrets and
other confidential or proprietary information.

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         6. APPOINTMENT OF SECURED PARTY AS ATTORNEY-IN-FACT.

                  (a) Powers. Debtor hereby irrevocably constitutes and appoints
Secured Party, and any agent of Secured Party, with full power of substitution,
as its true and lawful attorney-in-fact with full irrevocable power and
authority in the place and stead of Debtor and in the name of Debtor or in the
name of Secured Party, from time to time in Secured Party's discretion, for the
purpose of carrying out the terms of this Agreement, to take any and all
appropriate actions and to execute any and all documents which may be necessary
or desirable to accomplish the purposes of this Agreement, including (without
limiting the generality of the foregoing) to execute, in connection with any
sale or other disposition of Collateral pursuant to Section 7 hereof, any
endorsements, assignments, bills of sale, licenses or other instruments of
conveyance or transfer with respect to the Collateral. This power of attorney is
a power coupled with an interest and is irrevocable.

                  (b) No Duty on Secured Party's Part. The powers conferred on
Secured Party hereunder are solely to protect Secured Party's interests in the
Collateral and will not impose any duty upon it to exercise any such powers.
Secured Party and its agents will not be responsible to Debtor for any act or
failure to act hereunder, except for Secured Party's own gross negligence or
willful misconduct. It is further agreed and understood between the parties
hereto that such care as Secured Party gives to the safekeeping of its own
property of like kind shall constitute reasonable care of the Collateral when in
Secured Party's possession.

         7. SECURED PARTY'S RIGHTS AND REMEDIES; RELEASE.

                  (a) General Remedies. If an Event of Default occurs, then in
addition to exercising any other right or remedies Secured Party may have under
the Note, at law or in equity, or pursuant to the provisions of the Code,
Secured Party may, at its sole option and without demand first made, exercise
any one, some or all of the following rights and remedies:

                           (i) Collect the Collateral and its Proceeds;

                           (ii) Take  possession  of the  Collateral and its
Proceeds wherever such may be found or require Debtor to assemble the Collateral
and its Proceeds and make it available to Secured Party at a place designated by
Secured Party which is reasonably convenient to Debtor and Secured Party;

                           (iii) Proceed with the foreclosure of the security
interest in the Collateral or any part thereof granted herein and the sale or
endorsement and collection of the Proceeds of such Collateral in any manner
permitted by law or provided for herein;

                           (iv) Sell, lease, license or otherwise dispose of the
Collateral or any part thereof at public or private sale, with or without having
the Collateral at the place of sale, after giving Debtor ten (10) days prior
written notice of such sale, lease, license or other disposition of Collateral;

                           (v) Institute a suit or other action against Debtor
for recovery on the Note;

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                           (vi) Exercise any rights and remedies of a secured
party under the Code; and/or

                           (vii) With respect to any Software, Inventions,
Documentation, Intellectual Property and Licenses, in the exercise of the rights
of a secured party under applicable law with respect thereto, and subject to the
rights of any licensor of any such property not owned by Debtor, use, exercise,
practice, reproduce, perform, display, distribute, create derivative works,
make, have made, sell, license, sublicense, transfer, assign and commercialize.

                  (b) No Election of Remedies. The election by Secured Party of
any right or remedy will not prevent Secured Party from exercising any other
right or remedy against Debtor.

                  (c) Proceeds. If an Event of Default occurs, all proceeds and
payments with respect to the Collateral will be retained by Secured Party (or,
if received by Debtor, will be held in trust and will be delivered by Debtor to
Secured Party in the original form received, endorsed in blank) and held by
Secured Party as part of the Collateral or applied by Secured Party to the
payment of the Obligations.

                  (d) Sale of Collateral. Any item of Collateral may be sold,
leased or licensed or otherwise disposed of for cash or other value at public or
private sale or other disposition and the Proceeds thereof collected by or for
Secured Party. Debtor agrees to promptly execute and deliver, or promptly cause
to be executed and delivered, such instruments, documents, assignments, waivers,
certificates and affidavits and supply or cause to be supplied such further
information and take such further action as Secured Party may require in
connection with any such sale or disposition. Secured Party shall have the right
upon any such public sale or sales, and, to the extent permitted by law, upon
any such private sale or sales, to purchase the whole or any part of the
Collateral so sold, free of any right or equity of redemption in Debtor, which
right or equity is hereby waived or released. If any notice of a proposed sale,
lease, license or other disposition of Collateral shall be required by law, such
notice shall be deemed reasonable and proper if given at least ten (10) days
before such sale, lease, license or other disposition. Secured Party agrees to
give Debtor ten (10) days prior written notice of any sale, lease, license or
other disposition of Collateral (or any part thereof) by Secured Party.

                  (e) Application of Proceeds. The proceeds of all sales and
collections in respect of the Collateral, the application of which is not
otherwise specifically herein provided for, will be applied as follows:

                           (i) First, to the payment of the costs and expenses
of such sale or sales and collections and the attorneys' fees and out-of-pocket
expenses incurred by Secured Party relating to costs of collection;

                           (ii) Second, any surplus then remaining will be
applied first, to the payment of all unpaid interest accrued under the Note,
next to the payment of unpaid principal under the Note, and next to the
satisfaction of any remaining Obligations; and

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<PAGE>   7

                           (iii) Third, any surplus then remaining will be paid
to Debtor.

                  (f) Liability for Deficiency. Debtor will remain liable for
any deficiency if the Proceeds of any sale or other disposition of the
Collateral are insufficient to pay the Obligations and the fees and
disbursements of any attorneys or agents employed by Secured Party to collect
such deficiency.

                  (g) Limitation on Duties Regarding Collateral. Secured Party's
sole duty with respect to the custody, safekeeping and physical preservation of
the Collateral in its possession, under the Code or otherwise, shall be to deal
with it in the same manner as Secured Party deals with similar property for its
own account. Secured Party and its agents will not be liable for failure to
demand, collect or realize upon all or any part of the Collateral or for any
delay in doing so nor will any of them be under any obligation to sell or
otherwise dispose of any Collateral upon the request of Debtor or otherwise.

                  (h) Recourse. If, after Secured Party has exercised its rights
and remedies against the Collateral, any deficiencies remain with respect to the
payment of the Obligations, Secured Party shall have the rights and remedies of
an unsecured creditor with respect to all other assets of Debtor.

                  (i) Release. Upon the full and complete payment and
performance when due of the Obligations, upon Debtor's written request and at
Debtor's sole expense, Secured Party will promptly and duly execute and deliver
such further instruments and documents and take such further action as Debtor
may reasonably request for the purpose of releasing or terminating the security
interests granted under this Agreement.

         8. GOVERNING LAW; VENUE.

                           (i) This Agreement shall be governed by and construed
under the laws of the State of California as applied to agreements among
California residents entered into and to be performed entirely within
California, without reference to principles of conflict of laws or choice of
laws (except to the extent governed by the Code).

                           (ii) The parties agree that any dispute regarding the
interpretation or validity of, or otherwise arising out of this Agreement, shall
be subject to the exclusive jurisdiction of the California State Courts in and
for Santa Clara County, California, or, in the event of federal jurisdiction,
the United States District Court for the Northern District of California sitting
in Santa Clara County, California, and each party hereby agrees to submit to the
personal and exclusive jurisdiction and venue of such courts and not to seek the
transfer of any case or proceeding out of such courts.

         9. NO WAIVER. Secured Party will not by any act (except by a written
instrument pursuant to Section 11 hereof), delay, indulgence, omission or
otherwise be deemed to have waived any right or remedy hereunder or to have
acquiesced in any Event of Default or in any breach of any of the terms and
conditions hereof. No failure to exercise, nor any delay in

                                       7
<PAGE>   8

exercising, on the part of Secured Party, any right, power or privilege
hereunder will operate as a waiver thereof. No single or partial exercise of any
right, power or privilege hereunder will preclude any other or further exercise
thereof or the exercise of any other right, power or privilege. A waiver by
Secured Party of any right or remedy hereunder on any one occasion shall not be
construed as a bar to any right or remedy which Secured Party would otherwise
have on any future occasion. The rights and remedies of Secured Party herein
provided are cumulative, may be exercised singly or concurrently and are not
exclusive of any other rights or remedies provided by law.

         10. SUCCESSORS AND ASSIGNS. The terms and conditions of this Agreement
shall inure to the benefit of and be binding upon the successors and permitted
assigns of the parties; provided, however, that Debtor may not assign or
delegate any of its rights or obligations hereunder without Secured Party's
prior written consent, and any assignment or7 delegation without such consent
shall be void. Nothing herein shall be interpreted to prevent, limit or
otherwise restrain Debtor's grant of licenses to customers and other third
parties in the ordinary course of its business.

         11. AMENDMENTS AND WAIVERS. Any term of this Agreement may be amended
and the observance of any term of this Agreement may be waived (either generally
or in a particular instance and either retroactively or prospectively), only
with the written consent of both Debtor and Secured Party.

         12. RIGHTS AND REMEDIES CUMULATIVE. The rights and remedies herein
provided will be cumulative and not exclusive of any other rights or remedies
provided by law or otherwise.

         13. SEVERABILITY. If any provision of this Agreement, or the
application thereof, will for any reason and to any extent be invalid or
unenforceable, the remainder of this Agreement and application of such provision
to other persons or circumstances will be interpreted so as reasonably to effect
the intent of the parties hereto. The parties further agree to replace such void
or unenforceable provision of this Agreement with a valid and enforceable
provision that will achieve, to the extent possible, the economic, business and
other purposes of the void or unenforceable provision.

         14. NOTICES. Any notice or other communication required or permitted to
be given under this Agreement shall be in writing, shall be delivered by hand or
overnight courier service, by certified mail, postage prepaid, or by facsimile,
and will be deemed given upon delivery, if delivered personally, one business
day after deposit with a national courier service for overnight delivery, or one
business day after transmission by facsimile with confirmation of receipt, and
three days after deposit in the mails, if mailed, to the following addresses:

                                       8
<PAGE>   9

                  (i)  If to Debtor:

                                    Caldera International, Inc.
                                    240 West Center Street
                                    Orem, Utah 84057
                                    Attention:  President and CEO

                                    With a copy (which shall not constitute
                                    notice) to:

                                    Brobeck Phleger & Harrison LLP
                                    370 Interlocken Blvd., Suite 500
                                    Broomfield, Colorado  80021
                                    Attention:  John E. Hayes, III

                  (ii)  If to Secured Party:

                                    The Santa Cruz Operation, Inc.
                                    425 Encinal
                                    Santa Cruz, California 95061
                                    Attention: Chief Executive Officer and Law
                                    and Corporate Affairs

                                    With a copy (which shall not constitute
                                    notice) to:

                                    Wilson, Sonsini, Goodrich & Rosati
                                    650 Page Mill Road
                                    Palo Alto, California 94304
                                    Attention:  Michael Danaher

or to such other address as a party may have furnished to the other parties in
writing pursuant to this Section 14, except that notices of change of address
shall only be effective upon receipt.

         15. ATTORNEYS' FEES. If any action at law or in equity is necessary to
enforce or interpret the terms of this Agreement, the prevailing party shall be
entitled to recover, as an element of the costs of suit and not as damages,
reasonable attorneys' fees, costs and necessary disbursements in addition to any
other relief to which such party may be entitled. The prevailing party will be
entitled to recover its costs of suit, regardless of whether such suit proceeds
to final judgment.

         16. ENTIRE AGREEMENT. This Agreement, the Note and the Reorganization
Agreement and all exhibits and schedules hereto and thereto, when taken
together, constitute the entire understanding and agreement of the parties
hereto with respect to the subject matter hereof and supersede all prior and
contemporaneous agreements or understandings, inducements or conditions, express
or implied, written or oral, between the parties with respect hereto.

                                       9
<PAGE>   10

         17. CONSTRUCTION OF AGREEMENT. This Agreement has been negotiated by
the respective parties hereto and their attorneys and the language hereof will
not be construed for or against either party. Unless otherwise explicitly set
forth, a reference to a Section or an Exhibit will mean a Section in, or Exhibit
to, this Agreement, all of which Exhibits are incorporated herein by this
reference. The titles and headings herein are for reference purposes only and
will not in any manner limit the construction of this Agreement, which will be
considered as a whole.

         18. COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument. This Agreement will
become binding when one or more counterparts hereof, individually or taken
together, will bear the signatures of all parties reflected hereon as
signatories.

                           [SIGNATURE PAGE TO FOLLOW]

                                       10
<PAGE>   11

       IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and delivered as of the date first above written.

SECURED PARTY:                            DEBTOR:

THE SANTA CRUZ OPERATION, INC.            CALDERA SYSTEMS, INC.

By:                                       By:
   --------------------------                 ----------------------------------

Name:                                     Name:
     ------------------------                   --------------------------------

Title:                                    Title:
      -----------------------                    -------------------------------

                  [SIGNATURE PAGE TO SECURITY AGREEMENT BETWEEN
            THE SANTA CRUZ OPERATION, INC. AND CALDERA SYSTEMS, INC.]

ATTACHMENTS:

Exhibit A - Definitions

                                       11
<PAGE>   12

                                    EXHIBIT A

                                   DEFINITIONS

         As used in the Security Agreement to which this Exhibit A is attached,
the following terms will have the following meanings:

         (a) "CAPITALIZED LEASE OBLIGATIONS" shall mean any and all lease
obligations that, in accordance with GAAP, are required to be capitalized on the
books of a lessee.

         (b) "CODE" means the Uniform Commercial Code (or successor law) as from
time to time in effect in the State of California.

         (c) "COLLATERAL" will have the meaning assigned to such term in Section
2 of the Security Agreement.

         (d) "COPYRIGHTS" means all past, present and future copyrights,
copyright applications and copyright registrations in the United States and in
any and all other countries and jurisdictions, including, without limitation,
all of the exclusive rights afforded a copyright owner in the United States
under 17 U.S.C. Section 106 and any rights relating to copyrights which may in
the future arise by act of Congress or any foreign governmental entity, and any
rights given to a copyright owner or registrant in or under any copyright
conventions, treaties or foreign laws, and further including, without
limitation, all renewals extensions, and modifications thereof, all income,
royalties, damages and payments now or hereafter due and/or payable under or
with respect thereto, the right to sue for, and to recover damages and receive
remedies for, all past, present and future infringements thereof, and all other
rights of any kind whatsoever accruing thereunder or pertaining thereto anywhere
in the world.

         (e) "DOCUMENTATION" means, collectively: (i) all documentation,
manuals, drawings, designs, plans, blueprints, specifications, schematics,
layouts, flow charts, logic diagrams, engineering and test reports, components
lists, customer lists, suppliers lists, user, installation or repair manuals,
programmers' notes, programming documentation, any recorded information
regarding any Invention, and any other works of authorship; (ii) all
documentation regarding the design, development, testing or manufacture of any
products or any equipment used to design, develop, test, or manufacture any such
products or components of such products; (iii) all field repair data, sales data
and other information relating to sales or service of any products; and (iv) all
media in which or on which any of the are recorded or stored or from which they
can be read or retrieved.

<PAGE>   13

         (f) "EVENT OF DEFAULT" Ten (10) days after written notice from Secured
Party to Debtor for monetary defaults and thirty (30) days after written notice
from Secured Party to Debtor for non-monetary defaults, if such defaults are not
cured within such ten (10) day or thirty day (30) periods, respectively, each of
the following shall constitute an event of default ("EVENT OF DEFAULT") under
this Agreement:

                  (i) Default in Payment. If Debtor fails to make any payment
due and payable under the terms of the Note or this Agreement.

                  (ii) Representations and Warranties. If any of the
representations and warranties made by Borrower shall be false or misleading in
any material respect when made.

                  (iii) Covenants. If Borrower shall be in material default
under any of the material terms, covenants, conditions, or obligations under any
Loan Document.

                  (iv) Dissolution. If Borrower is dissolved.

                  (v) Receiver. If a receiver, trustee, or custodian is
appointed for any part of the Collateral, or any part of the Collateral is
assigned for the benefit of creditors.

                  (vi) Impairment to Lien. If at any time any lien created under
the Note or this Agreement on any of the Collateral may be impaired by any
material lien, encumbrance or other defect other than the Prior Liens or the
Permitted Liens.

                  (vii) Bankruptcy. If a petition in bankruptcy is filed against
Debtor, and such petition is not dismissed within ninety (90) days of filing, a
petition in bankruptcy is filed by Borrower or a receiver, trustee or custodian
of any part of the Collateral is appointed; or if Borrower files a petition for
reorganization under any of the provisions of the Bankruptcy Act or any law,
State or Federal, or makes an assignment for the benefit of creditors or is
adjudged insolvent by any State or Federal Court of competent jurisdiction.

                  (viii) Judgment or Attachment. If any writ, attachment,
citation, judgment, lien or distress warrant being issued against or levied on
the Collateral for an amount in excess of $100,000.00 and such judgment or
attachment is not vacated, discharged, stayed or bonded pending appeal, or paid
or otherwise fully satisfied within thirty (30) days of the date it is entered.

                  (ix) Diminished Value. If the Collateral is subject to any
uninsured loss, theft, damage or destruction to the Collateral which materially
and substantially diminishes the value of the Collateral.

         (g) "GENERAL INTANGIBLES" has the meaning as set forth in Section 2(a)
of this Agreement.

         (h) "GOVERNMENTAL AUTHORITY" shall mean any domestic or foreign
national, state or local government, any political subdivision thereof, any
department, agency, authority or bureau

<PAGE>   14

of any of the foregoing, or any other entity exercising executive, legislative,
judicial, regulatory or administrative functions of or pertaining to government.

         (i) "GOVERNMENTAL CHARGES" shall mean all taxes, levies, assessments,
fees, claims or other charges imposed by any Governmental Authority upon or
relating to (i) Debtor, (ii) the Note, (iii) employees, payroll, income or gross
receipts of Debtor, (iv) the ownership or use of any of its assets by Debtor, or
(v) any other aspect of the business of Debtor.

         (j) "INTELLECTUAL PROPERTY" means, any, some or all of the following:
(i) Copyrights, Patents, Mask Works, Trademarks, know-how, trade secrets,
proprietary information, Moral Rights and any and all other forms of
intellectual property; (ii) all Licenses and similar rights granted to or held
by Debtor with respect to any Copyrights, Patents, Mask Works, Trademarks,
Inventions, Software, Documentation, know-how, trade secrets, proprietary
information, Moral Rights or other form of intellectual property, (iii) all
licenses, consents, permits, variances, certifications and approvals of
governmental agencies; and (iv) all causes of action, claims and warranties in
respect of any of the items listed above.

         (k) "INVENTIONS" means all past, present and future inventions,
improvements, enhancements, processes, production or manufacturing methods,
compositions of matter, formulas, Software, works of authorship, data, and other
proprietary information, whether or not protected or protectable by copyright,
patent, mask work, trade secret or other laws regarding intellectual property.

         (l) "LICENSES" means all past, present and future licenses,
sublicenses, covenants-not-to-sue, consents and authorizations relating to any
Intellectual Property, Documentation, Software or Inventions.

         (m) "LOAN DOCUMENTS" means the Note and this Agreement together with
all schedules and exhibits attached thereto.

         (n) "MASK WORK" means mask work as defined in the Semiconductor Chip
Protection Act of 1984 and all registrations of claims of protection for such
mask work under the laws of the United States of America or any other
jurisdiction.

         (o) "MORAL RIGHTS" means any right to claim authorship to or to object
to any distortion, mutilation, or other modification or other derogatory action
in relation to a work, whether or not such would be prejudicial to the author's
reputation, and any similar right, existing under common or statutory law of any
country in the world or under any treaty, regardless of whether or not such
right is denominated or generally referred to as a "moral right." "Moral Rights"
include, without limitation, anything designated as a moral right under any law,
statute, treaty or convention.

         (p) "OBLIGATIONS" means all obligations, liabilities and indebtedness
of Debtor to Secured Party and/or its assigns, whether direct or indirect,
absolute or contingent, due or to become due, now existing or hereafter
incurred, which may arise under or out of the Loan Documents, whether for
obligations with respect to principal, interest, costs, expenses (including,

<PAGE>   15

without limitation, all reasonable fees and disbursements of counsel to Secured
Party) or otherwise.

         (q) "PATENTS" means all past, present and future patents and patent
applications in the United States and in all other countries and jurisdictions,
including, without limitation, the inventions and improvements described or
claimed therein, together with the reissues, divisions, continuations, renewals,
extensions and continuations-in-part thereof, and all rights given to a patent
owner in or under any patent conventions, treaties and foreign laws, and further
including, without limitation, all income, royalties, damages and payments now
or hereafter due and/or payable under or with respect thereto, the right to sue
for, and to recover damages and receive remedies for, all past, present and
future infringements thereof, and all rights of any kind accruing thereunder or
pertaining thereto anywhere in the world.

         (r) "PERMITTED LIENS" shall mean and include:

                  (i) Liens securing obligations of less than $50,000 each, and
that are:

                           (A) Liens for taxes or other Governmental Charges not
at the time delinquent or thereafter payable without penalty or being contested
in good faith, provided provision is made to the reasonable satisfaction of
Secured Party for the eventual payment thereof if subsequently found payable,
(adequate reserves maintained on the books of the Debtor in accordance with GAAP
shall be deemed reasonably satisfactory to Secured Party);

                           (B) Liens of carriers, warehousemen, mechanics,
materialmen, vendors, and landlords incurred in the ordinary course of business
for sums not overdue or being contested in good faith, provided provision is
made to the reasonable satisfaction of Secured Party for the eventual payment
thereof if subsequently found payable;

                           (C) Deposits under workers' compensation,
unemployment insurance and social security laws or to secure the performance of
bids, tenders, contracts (other than for the repayment of borrowed money) or
leases, or to secure statutory obligations of surety or appeal bonds or to
secure indemnity, performance or other similar bonds in the ordinary course of
business;

                           (D) Liens securing obligations under a Capitalized
Lease Obligation or operating lease and if such Liens do not extend to property
other than the property leased under such Capitalized Lease Obligation or
operating lease; and

                           (E) Liens upon any equipment acquired or held by
Debtor to secure the purchase price of such equipment or indebtedness incurred
solely for the purpose of financing the acquisition of such equipment;

                           (F) Easements, reservations, rights of way,
restrictions, minor defects or irregularities in title and other similar charges
or encumbrances affecting real property in a manner not materially or adversely
affecting the value or use of such property;

<PAGE>   16

                           (G) Liens on insurance proceeds in favor of insurance
companies to secure the financing of insurance premiums;

                           (H) Liens which constitute rights of setoff of a
customary nature or bankers' Liens with respect to amounts on deposit, whether
arising by operation of law or by contract, in connection with arrangements
entered into with banks in the ordinary course of business not relating to a
financing transaction;

                  (ii) Liens arising out of a judgment or award in circumstances
not constituting an Event of Default;

                  (iii) Leases, subleases, licenses and sublicenses entered into
by Debtor in the ordinary course of business;

                  (iv) Liens in favor of Secured Party, or;

                  (v) Liens that have been approved in writing by Secured Party.

                  (vi) Liens incurred in connection with the extension, renewal
or refinancing of the indebtedness secured by liens of the type described in
clauses (i) through (v) above, provided that any extension, renewal or
replacement lien shall be limited to the property encumbered by the existing
lien and the principal amount of the indebtedness being extended, renewed or
refinanced does not increase.

         (s) "Prior Liens" means any lien(s) pertaining to the Collateral in
effect prior to the close of the Reorganization Agreement, which is/are assumed
by Debtor in connection with the transfer of the Collateral to Debtor.

         (s) "PROCEEDS" means whatever is received upon the sale, exchange,
collection, licensing or other disposition of Collateral or proceeds of
Collateral, including, without limitation, insurance proceeds.

         (t) "SOFTWARE" means all past, present and future computer programs, in
any and all forms including source code, object code, executable code, binary
code and machine readable code, and including applications, system software,
communications software, development tools, software utilities, development
environments, interfaces, and other computer code, and further including the
graphics, sounds, data and other content in or generated by the foregoing
computer programs.

         (u) "TRADEMARKS" means all past, present and future trade names,
trademarks, trademark applications, trademark registrations, service marks,
service mark applications, and service mark registrations in the United States
and any and all other countries and jurisdictions, including, without
limitation, all renewals of trademark and service mark registrations, and all
rights given to a trademark or service mark owner or registrant in or under any
trademark or service mark conventions, treaties and foreign laws, and further
including, without limitation, all income, royalties, damages and payments now
or hereafter due and/or payable under or with respect thereto, the right to sue
for, and to recover damages and receive remedies for, all past,

<PAGE>   17

present and future infringements thereof, and all rights of any kind accruing
thereunder or pertaining thereto anywhere in the world.

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