Document:

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                         PLEDGE AND SECURITY AGREEMENT

          This PLEDGE AND SECURITY AGREEMENT (as amended, supplemented or
modified from time to time, this "Pledge Agreement") is dated as of June 29,
2000, and is by MICROSTRATEGY INCORPORATED, a Delaware corporation (the
"Borrower") in favor of BANK OF AMERICA, N.A., a national banking association
(the "Pledgee").

          The Borrower and the Bank have entered into a certain Credit
Agreement dated March 26, 1999 (as modified by a certain First Modification
Agreement dated as of May 15, 2000, and as from time to time otherwise amended,
supplemented and replaced, the "Credit Agreement"). Terms used herein and
defined in the Credit Agreement and not otherwise defined herein, shall have
their meanings herein as therein defined. To provide collateral security for all
of the obligations of the Borrower under the Loan Obligations, the Borrower has
requested that the Pledgee accept this Pledge Agreement.  The Pledgee has agreed
to do so, but only upon the terms and conditions set forth herein.  Accordingly,
the parties hereto agree as follows:

                                   ARTICLE I
                                  DEFINITIONS

          Section 1.1.   Specifically Defined Terms.  As used in this Pledge
                         --------------------------
Agreement, the following terms shall have the following meanings:

          (a)  "Account" means securities account number 872822 maintained by
the Borrower with the Intermediary, all subacccounts and additional accounts in
connection therewith which are now existing or hereafter arising, and all
replacement accounts for any of the foregoing.

          (b)  "Book-entry Treasury Security" has the meaning given to the term
"Book-entry Security" in 31 CFR 357.2(a) or any successor provision.

          (c)  "Debt" has the meaning given that term in the Credit Agreement.

          (d)  "Intermediary" means Bank of America, N.A., a national banking
association, and its successors, in its capacity as such with regard to the
Account and the other Pledged Collateral.

          (e)  Each term specifically defined in any other section of this
Pledge Agreement shall have the meaning given to said term therein.

          Section 1.2.   UCC Terms.  Unless otherwise specifically defined
                         ---------
herein, or unless the context otherwise requires, all terms used herein which
are defined in the Virginia Uniform Commercial Code shall have the meanings
therein stated.  As used herein, "UCC" means at any time the Virginia Uniform
Commercial Code; provided that, if, by reason of mandatory provisions of law,
                 --------
the validity or perfection of any security interest granted herein is governed
by the Uniform Commercial Code as in effect in a jurisdiction other than the
Commonwealth of Virginia, then, as to the validity or perfection of such
security interest, "UCC" shall mean the Uniform Commercial Code in effect in
such other jurisdiction. In the event "UCC" is construed to mean the Uniform
Commercial Code in effect in a jurisdiction other than Virginia, then specific
Uniform Commercial Code references herein shall be construed to mean the
corresponding Uniform Commercial Code provision in such
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other jurisdiction.

                                  ARTICLE II
                            THE SECURITY INTERESTS

          Section 2.1.   The Security Interests.  The Borrower hereby pledges to
                         ----------------------
the Pledgee, and grants to the Pledgee a security interest in, the following
(the "Pledged Collateral"):

                  (i)    the Account;

                  (ii)   all cash, investment property, financial assets,
security entitlements, securities, commodity contracts and instruments which are
now or may hereafter be held, contained or deposited in, arising under, or
subject to, the Account, including, without limitation, those listed on Schedule
1 hereto, and all additions thereto and substitutions and replacements therefor
(the "Listed Assets"); and all dividends, distributions, cash, instruments and
other property and proceeds from time to time received, receivable or otherwise
made upon or distributed in respect of or in exchange for any or all of the
Listed Assets;

                  (iii)  all additional investment property and financial assets
from time to time acquired by the Borrower in any manner and held or subject to
the Account and all dividends, distributions, cash, instruments and other
property from time to time received, receivable or otherwise made upon or
distributed in respect of or in exchange for any or all of such securities;

                  (iv)   all rights of the Borrower against the Intermediary or
any other third party arising out of the Account, or any instrument or agreement
in connection therewith in which the Borrower has rights;

                  (v)    all general intangibles now existing or hereafter
arising with respect to any of the foregoing;

                  (vi)   all instruments, security certificates and other
certificates representing any of the foregoing; and

                  (vii)  to the extent not otherwise included in the foregoing,
all cash and non-cash proceeds thereof.

          Section 2.2.   Security for Obligations.  This Pledge Agreement
                         ------------------------
secures the payment of all Loan Obligations. The security interests granted by
this Pledge Agreement are granted as security only and shall not subject the
Pledgee to, or transfer or in any way affect or modify, any obligation or
liability of the Borrower with respect to the Account, any of the Pledged
Collateral, or any transaction in connection therewith.

          Section 2.3.   Control of Pledged Collateral.  All Pledged Collateral
                         -----------------------------
shall be pledged or transferred to the Pledgee so as to create a perfected first
priority security interest therein in favor of the Pledgee through control of
the Pledged Collateral by the Pledgee in accordance with applicable provisions
of the UCC.  Without limiting in any way the foregoing:

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          (a)  All security certificates, other certificates, and instruments
representing or evidencing the Pledged Collateral shall be delivered to and held
by the Pledgee, or by the Intermediary on behalf of the Pledgee, pursuant hereto
and to Section 8.8A-301(a) or 8.9-304, as applicable, of the UCC, and shall be
in suitable form for transfer by delivery, or shall be accompanied by duly
executed instruments of transfer or assignment in blank, or specially indorsed
to the Pledgee, with signatures appropriately guaranteed, and accompanied in
each case by any required documentary or transfer tax stamps, and any other
documents necessary or, in the sole discretion of the Pledgee, desirable, to
cause the Pledgee to have control of (within the meaning of Sections 8.9-115(e)
and 8.8A-106 of the UCC) and a security interest in the Pledged Collateral, all
in form and substance satisfactory to the Pledgee.  The Pledgee shall have the
right, at any time in its discretion and without notice to the Borrower, to
cause any or all of such Pledged Collateral to be transferred of record into the
name of the Pledgee or its nominee.  All such certificates or instruments held
by the Intermediary shall be segregated from all other securities or other
assets of the Borrower the Pledgee or any other person held by the Intermediary
in any capacity other than as Intermediary hereunder.

          (b)  With respect to all Pledged Collateral consisting of
uncertificated securities, the Borrower shall cause, as appropriate, (i) each
issuer of said Pledged Collateral to agree in writing that it will comply with
instructions originated by the Pledgee without further consent by the Borrower
or other registered owner; or (ii) said Pledged Collateral to be delivered to
and held by the Pledgee pursuant hereto and to Section 8.8A-301(b) of the UCC.
The Pledgee shall have the right, at any time in its discretion and without
notice to the Borrower, to cause any or all of such Pledged Collateral to be
transferred of record into the name of the Pledgee or its nominee.

          (c)  With respect to all Pledged Collateral consisting of security
entitlements, the Borrower shall (i) issue its entitlement order to the
Intermediary instructing that the Pledgee be forthwith identified in the
Intermediary's records as the entitlement holder of said Pledged Collateral, or
(ii) cause the Intermediary to agree in writing that it will comply with
entitlement orders originated by the Pledgee without further consent by the
Borrower or other entitlement holder.

          (d)  With respect to all Pledged Collateral consisting of commodity
contracts, the Borrower shall cause the Intermediary to agree, in a writing
executed by the Intermediary, the Borrower and the Pledgee, that the
Intermediary will apply any value distributed on account of said commodity
contracts as directed by the Pledgee without further consent by the Borrower or
other commodity customer.

          (e)  With respect to all Pledged Collateral consisting of Book-entry
Treasury Securities, the Borrower shall (i) (A) issue its entitlement order to
the Intermediary instructing that the Pledgee be forthwith identified in the
Intermediary's records as the entitlement holder of said Pledged Collateral, or
(B) cause the Intermediary to agree in writing that it will comply with
entitlement orders originated by the Pledgee without further consent by the
Borrower or other entitlement holder, and (ii) use its best efforts to have, or
cause the Intermediary to use its best efforts to have, the appropriate Federal
Reserve Bank (or Banks) mark its books and records to record the security
interest of the Pledgee in such Pledged Collateral.

          (f)  The Borrower shall otherwise cause the Pledgee to obtain control
over the Account in accordance with Section 8.9-115(e) of the UCC.

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          (g)  The Borrower shall cause the Intermediary, and any secured party
other than the Pledgee having control of any of the Pledged Collateral, to
subordinate in writing its security interest in the Pledged Collateral (whether
arising by contract or under the UCC or other applicable law) to that of the
Pledgee granted herein.

          (h)  The Borrower shall execute and deliver to the Pledgee UCC
financing statements and continuation statements to be filed by the Borrower in
all applicable jurisdictions as required to perfect the security interests
granted to the Pledgee hereunder, to the extent that applicable law permits
perfection of a security interest by filing under the UCC.

          Section 2.4.   Termination of Security Interests; Release of Pledged
                         -----------------------------------------------------
Collateral.  Upon the full, final and irrevocable payment and performance of all
----------
the Guaranty Obligations and Loan Obligations, the security interests in the
Pledged Collateral shall terminate and all rights to the Pledged Collateral
shall revert to the Borrower.  In addition, at any time and from time to time
prior to such termination of the security interests, the Pledgee may release any
of the Pledged Collateral.  Upon any such termination of the security interests
or any release of the Pledged Collateral, the Pledgee will, at the Borrower's
expense, execute and deliver to the Borrower such documents as the Borrower
shall reasonably request to evidence the termination of the security interests
or the release of the Pledged Collateral.  Any such documents shall be without
recourse to or warranty by the Pledgee.

          Section 2.5.   Security Interests Absolute.  Subject to the provisions
                         ---------------------------
of Section 2.4, all rights of the Pledgee and security interests hereunder, and
all obligations of the Borrower hereunder, shall be absolute and unconditional
and, without limiting the generality of the foregoing, shall not be released,
discharged or otherwise affected by:

                 (i)    any extension, renewal, settlement, compromise, waiver
or release in respect of any Loan Obligation or any other document evidencing or
securing such Loan Obligation by operation of law or otherwise;

                 (ii)   any modification or amendment or supplement to the
Credit Agreement, or any instrument or document evidencing or securing any Loan
Obligation;

                 (iii)  any release, non-perfection or invalidity of any direct
or indirect security for any Loan Obligation;

                 (iv)   the death or incompetence of the Borrower, or any change
in the existence, structure or ownership of the Borrower, or any insolvency,
bankruptcy, reorganization or other similar proceeding affecting the Borrower,
or its assets or any resulting disallowance, release or discharge of all or any
portion of the Loan Obligations;

                 (v)    the existence of any claim, set-off or other right which
the Borrower may have at any time against the Pledgee, or any other corporation
or person, whether in connection herewith or any unrelated transactions;
provided, that nothing herein shall prevent the assertion of any such claim by
--------
separate suit or compulsory counterclaim;

                 (vi)   any failure by the Pledgee (A) to file or enforce a
claim against the

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Borrower or its respective estates (in a bankruptcy or other proceeding), (B) to
give notice of the existence, creation or incurring by the Borrower of any new
or additional indebtedness or obligation under or with respect to the Loan
Obligations or Guaranty Obligations, (C) to commence any action against the
Borrower, (D) to disclose to the Borrower any facts which the Pledgee may now or
hereafter know with regard to the Borrower; or (E) to proceed with due diligence
in the collection, protection or realization upon any collateral securing the
Loan Obligations; or

                  (viii) any other act or omission to act or delay of any kind
by the Pledgee or any other corporation or person or any other circumstance
whatsoever which might, but for the provisions of this clause, constitute a
legal or equitable discharge of the Borrower's obligations hereunder.

                                  ARTICLE III
                        REPRESENTATIONS AND WARRANTIES

          The Borrower represents and warrants as follows:

          Section 3.1.   Binding Effect.  This Pledge Agreement constitutes a
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valid and binding agreement of the Borrower, enforceable against the Borrower in
accordance with its terms, except as the enforceability hereof may be limited by
bankruptcy, insolvency or similar laws affecting creditors' rights generally and
by equitable principles of general applicability (regardless of whether such
enforceability is considered in a proceeding in equity or at law).

          Section 3.2.   Title to Pledged Collateral.  The Borrower lawfully
                         ---------------------------
owns the Pledged Collateral and has good and marketable title thereto, to the
extent of its interest therein, free and clear of any liens (including, without
limitation, state and federal tax liens and issuer's liens) other than the
security interests granted hereby and Liens in favor of the Intermediary.  The
Account is not a margin account.

          Section 3.3.   Validity, Perfection and Priority of Security
                         ---------------------------------------------
Interests. Upon (i) delivery of all certificates or instruments representing or
---------
evidencing the Listed Assets registered in the Pledgee's name to the Pledgee,
(ii) the receipt by the Pledgee of an agreement in the form set forth as Exhibit
A hereto, appropriately completed and fully executed, and (iii) the proper
filing of UCC financing statements covering the Pledged Collateral in the
jurisdictions listed on Exhibit B hereto, the Pledgee will have a valid and
perfected security interest in the Pledged Collateral subject to no prior Lien,
other than the security interest of the United States with respect to Book-entry
Treasury Securities as set forth in 31 CFR 357.12(b) or Liens in favor of the
Intermediary. Except for the filing of financing statements, no registration,
recordation or filing with any governmental authority is required in connection
with the execution or delivery of this Pledge Agreement, or necessary for the
validity or enforceability hereof or for the perfection of the security
interests of the Pledgee granted hereby. The Borrower has not performed any acts
which might prevent the Pledgee from enforcing any of the terms and conditions
of this Pledge Agreement or which would limit the Pledgee in any such
enforcement.

          Section 3.4.   Governmental and Other Authorization; Contravention.
                         ---------------------------------------------------
The execution, delivery and performance by the Borrower of this Pledge Agreement
and the other

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instruments and agreements executed and delivered, or to be executed and
delivered, by it are within its organizational power, have been duly authorized
by all necessary action of its members, require no action by or in respect of,
or filing with, any governmental body, agency or official (other than the filing
of financing statements) and do not contravene, or constitute (with or without
the giving of notice or lapse of time or both) a default under, any provision of
applicable law or of any operating agreement or other organizational documents
of the Borrower or of any agreement, judgment, injunction, order, decree or
other instrument binding upon or affecting the Borrower or result in the
creation or imposition of any lien on any of its assets.

          Section 3.5.   Book-Entry Treasury Securities.  All Pledged Collateral
                         ------------------------------
consisting of Book-entry Treasury Securities is maintained in "TRADES" and not
in "TREASURY DIRECT" (as those terms are defined in 31 CFR 357.2(a) or any
successor provision).

          Section 3.7.   Existence and Power.   The Borrower is a corporation
                         -------------------
duly organized, validly existing and in good standing under the laws of the
State of Delaware, and has all organizational powers and all material
governmental licenses, authorizations, consents and approvals required to carry
on its business as now conducted.  The Borrower is duly qualified as a foreign
entity, licensed and in good standing in each jurisdiction in which the failure
to so qualify or be licensed, as the case may be, in the aggregate, could
reasonably be expected to have a material adverse effect on the business,
financial position, results of operations or properties of the Borrower.

                                  ARTICLE IV
                                   COVENANTS

          The Borrower agrees that so long as any Loan Obligation remains
unpaid:

          Section 4.1.   Filing; Further Assurances.  The Borrower will, at its
                         --------------------------
expense and in such manner and form as the Pledgee may reasonably require,
execute, deliver, file and record any financing statement, specific assignment
or other appropriate paper and take any other action that may be reasonably
necessary or desirable, or that the Pledgee may reasonably request, in order to
create, preserve, perfect or validate the security interests granted hereby or
to enable the Pledgee to exercise and enforce its rights hereunder with respect
to any of the Pledged Collateral.  To the extent permitted by applicable law,
the Borrower hereby authorizes the Pledgee to execute and file, in the name of
the Borrower or otherwise, UCC financing statements which the Pledgee reasonably
may deem necessary or appropriate to further perfect the security interests.

          Section 4.2.   Liens on Pledged Collateral.  The Borrower will not
                         ---------------------------
sell or otherwise dispose of, or authorize the sale or disposition of, or grant
any option with respect to, any of the Pledged Collateral or create or suffer to
exist any Lien (other than security interests in favor of the Pledgee, the Lien
of the Intermediary and the security interest of the United States with respect
to Book-entry Treasury Securities as set forth in 31 CFR 357.12(b)) on any
Pledged Collateral.  The Account shall not become a margin account.  The
Borrower agrees that it will cause the Intermediary to obtain, and hold in the
Account subject to the security interest granted in the Pledge Agreement, all
Listed Assets and all investment property in addition to or in substitution for
the Listed Assets.

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                                   ARTICLE V
                      DISTRIBUTIONS ON COLLATERAL; VOTING

          Section 5.1.    Right to Receive Distributions on Pledged Collateral;
                          -----------------------------------------------------
Voting and Other Rights.
-----------------------

          (a)     So long as no Event of Default has occurred and is continuing,
and subject to the provisions of Section 2.3:

                  (i)    The Borrower shall be entitled to exercise any and all
voting and other rights pertaining to the Pledged Collateral or any part thereof
(including, without limitation, rights of or with respect to conversions,
exchanges, subscriptions, calls, maturities, tenders and options, the right to
make substitutions for uncertificated securities and security entitlements, and
the right to originate instructions and entitlement orders to the issuer or the
Intermediary) for any purpose not inconsistent with the terms of the Credit
Agreement or this Pledge Agreement.

                  (ii)   The Borrower shall be entitled to receive and retain
any and all dividends, interest and other payments and distributions made upon
or with respect to the Pledged Collateral, provided, however, that any and all
                                           --------  -------

                         (A)  dividends and interest paid or payable other than
          in cash in respect of, and certificates, instruments and other
          property received, receivable or otherwise distributed in respect of,
          or in exchange for, any Pledged Collateral (including, without
          limitation, any certificate or instrument representing a stock
          dividend or a distribution in connection with any reclassification,
          increase or reduction of capital, or reorganization),

                         (B)  dividends and other distributions paid or payable
          in cash in respect of any Pledged Collateral in connection with a
          partial or total liquidation or dissolution or in connection with a
          reduction of capital, capital surplus or paid-in-surplus, and

                         (C)  cash paid, payable or otherwise distributed in
          respect of principal of, in redemption of, or in exchange for, any
          Pledged Collateral,

shall be, and shall be forthwith delivered to the Pledgee or the Intermediary to
hold as, Pledged Collateral and shall, if received by the Borrower, be received
in trust for the benefit of the Pledgee, be segregated from the other property
or funds of the Borrower and be forthwith delivered to the Pledgee or the
Intermediary as Pledged Collateral in the same form as so received (with any
necessary indorsement and, if appropriate, undated stock powers duly executed in
blank).

                  (iii)  The Pledgee shall execute and deliver (or cause to be
executed and delivered) to the Borrower all such proxies, powers of attorney,
consents, instructions, entitlement orders, ratifications and waivers and other
instruments as the Borrower may reasonably request for the purpose of enabling
the Borrower to exercise the voting and other rights which it is entitled to
exercise pursuant to paragraph (i) above and to receive the dividends or
interest payments which it is authorized to receive and retain pursuant to
paragraph (ii) above.

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          (b)     Upon the occurrence and during the continuance of an Event of
Default:

                  (i)    All rights of the Borrower to receive the dividends and
interest payments which it would otherwise be authorized to receive and retain
pursuant to Section 5.1(a)(ii) shall cease, and all such rights shall thereupon
become vested in the Pledgee which shall thereupon have the sole right to
receive and hold as Pledged Collateral such dividends and interest payments.

                  (ii)   All dividends and interest payments which are received
by the Borrower contrary to the provisions of paragraph (i) of this Section
5.1(b) shall be received in trust for the benefit of the Pledgee, shall be
segregated from other funds of the Borrower and shall be forthwith paid over to
the Pledgee as Pledged Collateral in the same form as so received (with any
necessary indorsement).

          (c)     Upon the occurrence and during the continuance of an Event of
Default and upon notice by the Pledgee to the Borrower, all rights of the
Borrower to exercise the voting and other rights which it would otherwise be
entitled to exercise pursuant to Section 5.1(a)(i) shall cease, and all such
rights shall thereupon become vested in the Pledgee who shall thereupon have the
sole right (but in no event any obligation) to exercise such voting and other
rights.

                                  ARTICLE VI
                          GENERAL AUTHORITY; REMEDIES

          Section 6.1.   General Authority.  The Borrower hereby irrevocably
                         -----------------
appoints the Pledgee and any officer or agent thereof, with full power of
substitution, as its true and lawful attorney-in-fact, in the name of the
Borrower or its own name, for the sole use and benefit of the Pledgee, but at
the Borrower's expense, at any time and from time to time after the occurrence
and during the continuance of an Event of Default, to take any and all
appropriate action and to execute any and all documents and instruments which
may be necessary or desirable to carry out the terms of this Pledge Agreement
and, without limiting the foregoing, the Borrower hereby gives the Pledgee the
power and right on its behalf, without notice to or further assent by the
Borrower to do the following:

                 (i)     to receive, take, indorse, assign and deliver any and
all checks, notes, drafts, acceptances, documents and other negotiable and non-
negotiable instruments taken or received by the Borrower as, or in connection
with, the Pledged Collateral;

                 (ii)    to demand, sue for, collect, receive and give
acquittance for any and all monies due or to become due upon or in connection
with the Pledged Collateral;

                 (iii)   to commence, settle, compromise, compound, prosecute,
defend or adjust any claim, suit, action or proceeding with respect to, or in
connection with, the Pledged Collateral;

                 (iv)    to sell, transfer, assign or otherwise deal in or with
the Pledged Collateral or any part thereof, as fully and effectually as if the
Pledgee were the absolute owner thereof; and

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                 (v)     to do, at its option, but at the expense of the
Borrower, at any time or from time to time, all acts and things which the
Pledgee deems necessary to protect or preserve the Pledged Collateral and to
realize upon the Pledged Collateral.

The Borrower shall fully cooperate, to the extent requested by the Pledgee, in
the completion of any notice, form, schedule, or other document filed by the
Pledgee on its own behalf or on behalf of the Borrower pursuant to the
Borrower's power of attorney, including, without limitation, any required notice
or statement of beneficial ownership or of the acquisition of beneficial
ownership of equity securities constituting part of the Pledged Collateral and
any notice of proposed sale of any such securities pursuant to Rule 144 of the
Securities Exchange Commission.

          Section 6.2.   UCC Rights.  If an Event of Default shall have
                         ----------
occurred, the Pledgee may in addition to all other rights and remedies granted
to it in this Pledge Agreement and in any other agreement securing, evidencing
or relating to the Obligations, exercise (i) all rights and remedies of a
secured party under the UCC (whether or not in effect in the jurisdiction where
such rights are exercised) and (ii) all other rights available to the Pledgee at
law or equity.

          Section 6.3.   Application of Cash; Sale of Pledged Collateral.
                         -----------------------------------------------

          (a)  The Borrower expressly agrees that if an Event of Default shall
occur and be continuing, the Pledgee, without demand of performance or other
demand or notice of any kind (except the notice specified below of the time and
place of any public or private sale) to or upon the Borrower or any other person
(all of which demands and notices are hereby waived by the Borrower), may
forthwith (i) apply the cash, if any, then held by it as Pledged Collateral as
specified in Section 6.7 and (ii) if there shall be no such cash or if such cash
shall be insufficient to pay the Obligations in full, to collect, receive,
appropriate and realize upon the Pledged Collateral, and sell, assign, give an
option or options to purchase or otherwise dispose of and deliver the Pledged
Collateral (or contract to do so) or any part thereof in one or more parcels
(which need not be in round lots) at public or private sale, at any office of
the Pledgee or elsewhere in such manner is commercially reasonable and, as the
Pledgee may deem best, for cash or on credit or for future delivery without
assumption of any credit risk.  The Pledgee shall have the right upon any such
public sale, and, if the Pledged Collateral is of a type customarily sold in a
recognized market or is of a type which is the subject of widely distributed
standard price quotations, upon any such private sale or sales, to purchase the
whole or any part of the Pledged Collateral so sold, and thereafter to hold the
same, absolutely and free from any right or claim of any kind, provided that any
such sale is conducted in a commercially reasonable manner.  To the extent
permitted by applicable law, the Borrower waives all claims, damages and demands
against the Pledgee arising out of the foreclosure, repossession, retention or
sale of the Pledged Collateral.

          (b)  Unless the Pledged Collateral threatens to decline speedily in
value or is of a type customarily sold on a recognized market, the Pledgee shall
give the Borrower 10 days' written notice of its intention to make any such
public or private sale or sale at a broker's board or on a securities exchange.
Such notice shall (i) in the case of a public sale, state the time and place
fixed for such sale, (ii) in the case of sale at a broker's board or on a
securities exchange, state the board or exchange at which such sale is to be
made and the day on which the Pledged Collateral, or the portion thereof being
sold, will first be offered for sale and (iii) in the case of a private sale,
state the day after which such sale may be consummated.  The Pledgee shall not
be obligated to make any such sale

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pursuant to any such notice. The Pledgee may adjourn any public or private sale
or cause the same to be adjourned from time to time by announcement at the time
and place fixed for the sale, and such sale may be made at any time or place to
which the same may be so adjourned. In the case of any sale of all or any part
of the Pledged Collateral on credit or for future delivery, the Pledged
Collateral so sold may be retained by the Pledgee until the selling price is
paid by the purchaser thereof, but the Pledgee shall not incur any liability in
case of the failure of such purchaser to take up and pay for the Pledged
Collateral so sold and, in the case of such failure, such Pledged Collateral may
again be sold upon like notice.

          Section 6.4.   Rights of Purchasers.  Upon any sale of the Pledged
                         --------------------
Collateral (whether public or private) pursuant to this Article VI, the Pledgee
shall have the right to deliver, assign and transfer to the purchaser thereof
the Pledged Collateral so sold.  Each purchaser (including the Pledgee) at any
such sale shall hold the Pledged Collateral so sold absolutely, free from any
claim or right whatsoever, including any equity or right of redemption of the
Borrower who, to the extent permitted by law, hereby specifically waives all
rights of redemption, including, without limitation, any right to redeem the
Pledged Collateral under Section 8.9-506 of the UCC, and any right to a judicial
or other stay or approval which it has or may have under any law now existing or
hereafter adopted.

          Section 6.5.   Other Rights of the Pledgee.  So long as an Event of
                         ---------------------------
Default has occurred and is continuing:

          (a)   The Pledgee (i) shall have the right and power (but in no event
the obligation) to institute and maintain such suits and proceedings as it may
deem appropriate to protect and enforce the rights vested in it by this Pledge
Agreement and (ii) may proceed by suit or suits at law or in equity to enforce
such rights and to foreclose upon the Pledged Collateral and to sell all, or
from time to time, any of the Pledged Collateral under the judgment or decree of
a court of competent jurisdiction.

          (b)   The Pledgee shall, to the extent permitted by applicable law,
without notice to the Borrower or any party claiming through it, without regard
to the solvency or insolvency at such time of any person then liable for the
payment of any of the Loan Obligations, without regard to the then value of the
Pledged Collateral and without requiring any bond from any complainant in such
proceedings, be entitled as a matter of right to the appointment of a receiver
or receivers (who may be the Pledgee) of the Pledged Collateral or any part
thereof, and of the profits, revenues and other income thereof, pending such
proceedings, with such powers as the court making such appointment shall confer,
and to the entry of an order directing that the profits, revenues and other
income of the property constituting the whole or any part of the Pledged
Collateral be segregated, sequestered and impounded for the benefit of the
Pledgee, and the Borrower irrevocably consents to the appointment of such
receiver or receivers and to the entry of such order.

          (c)   In no event shall the Pledgee have any duty (other than the
exercise of reasonable care) to exercise any rights or take any steps (either in
a timely manner or at all) to preserve the rights of the Borrower in the Pledged
Collateral, nor shall the Pledgee be liable to the Borrower or any other person
for any loss caused by the Pledgee's failure to meet any obligation imposed by
Section 8.9-207 of the UCC or any successor provision.  Without limiting the
foregoing, the Pledgee shall be deemed to have exercised reasonable care in the
custody and preservation of any of the Pledged Collateral in its actual
possession if the Pledged Collateral is accorded treatment substantially equal
to that which the Pledgee accords its own property, it being understood that the
Pledgee shall not

                                       10
<PAGE>

have any duty or responsibility for (i) ascertaining or taking action with
respect to calls, conversions, exchanges, maturities, tenders or other matters
(including, without limitation, the rights described in Section 5.1(a)(i))
relative to any Pledged Collateral, whether or not the Pledgee has or is deemed
to have knowledge of such matters or (ii) taking any necessary steps to preserve
rights against any parties with respect to any Pledged Collateral. No refusal,
failure, omission or delay by the Pledgee in complying with any request by or on
behalf of the Borrower to do any of the foregoing shall be deemed to be a
failure to exercise reasonable care.

          Section 6.6.   Waiver and Estoppel.
                         -------------------

          (a)   The Borrower agrees, to the extent it may lawfully do so, that
it will not at any time in any manner whatsoever claim or take the benefit or
advantage of, any appraisal, valuation, stay, extension, moratorium, turnover or
redemption law, or any law permitting it to direct the order in which the
Pledged Collateral shall be sold, now or at any time hereafter in force which
may delay, prevent or otherwise affect the performance or enforcement of this
Pledge Agreement, and hereby waives all benefit or advantage of all such laws.
The Borrower covenants that it will not hinder, delay or impede the execution of
any power granted to the Pledgee in this Pledge Agreement or any of the other
instrument or agreement evidencing or securing a Loan.

          (b)   The Borrower, to the extent it may lawfully do so, on behalf of
itself and all who claim through or under it, including without limitation any
and all subsequent creditors, vendees, assignees and lienors, waives and
releases all rights to demand or to have any marshalling of the Pledged
Collateral upon any sale, whether made under any power of sale granted herein or
pursuant to judicial proceedings or under any foreclosure or any enforcement of
this Pledge Agreement, and consents and agrees that all of the Pledged
Collateral may at any such sale be offered and sold as an entirety.

          (c)   The Borrower waives, to the extent permitted by law,
presentment, demand, protest and any notice of any kind (except the notices
expressly required hereunder) in connection with this Pledge Agreement and any
action taken by the Pledgee with respect to the Pledged Collateral.  The
Borrower waives and agrees not to assert any privileges which it may acquire
under Section 8.9-112 of the UCC.

          Section 6.7.   Application of Moneys.  The proceeds of any sale of, or
                         ----------------------
other realization upon, all or any part of the Pledged Collateral shall be
applied by the Pledgee in the following order of priority (the Borrower
remaining liable for any deficiency remaining unpaid after such application):

first, to payment of the expenses of such sale or other realization, including
-----
reasonable compensation to the Pledgee and its agents and counsel, and all
reasonable expenses, liabilities and advances incurred or made by the Pledgee,
its agents and counsel in connection therewith or in connection with the care,
safekeeping or otherwise of any or all of the Pledged Collateral, and any other
unreimbursed expenses for which the Pledgee is to be reimbursed pursuant to
Section 7.3;

          second, to payment of the Loan Obligations; and
          ------

          finally, any surplus then remaining shall be paid to the Borrower, or
          -------
its successors or

                                       11
<PAGE>

assigns, or to whomsoever may be lawfully entitled to receive the same or as a
court of competent jurisdiction may direct.

                                       12
<PAGE>

                                  ARTICLE VII
                                 MISCELLANEOUS

          Section 7.1.   Resolutions. The failure of the Borrower to execute and
                         ------------
deliver to the Pledgee within thirty (30) days a secretary's certificate of
resolutions authorizing the Borrower to execute this Pledge Agreement shall
constitute an Event of Default.

          Section 7.2.   Notices.  All notices, requests and other
                         -------
communications to any party hereunder shall be in writing and shall be given to
such party at its address set forth on the signature page hereof or to such
other address as such party may hereafter specify for the purpose by notice to
the other.  Each such notice, request or other communication shall be effective
(i) 5 days after such communication is deposited in the mails with first class
postage prepaid, addressed as aforesaid or (ii) if given by any other means,
when delivered at the address specified in this Section.  Rejection or refusal
to accept, or the inability to deliver because of a changed address of which no
notice was given shall not affect the validity of notice given in accordance
with this Section.

          Section 7.3.   Waivers, Non-Exclusive Remedies.  No failure on the
                         -------------------------------
part of the Pledgee to exercise, and no delay in exercising, no course of
dealing with respect to, any right under this Pledge Agreement shall operate as
a waiver thereof; nor shall any single or partial exercise by the Pledgee of any
right under this Pledge Agreement preclude any other or further exercise thereof
or the exercise of any other right.  The rights of the Pledgee under this Pledge
Agreement are cumulative and are not exclusive of any other remedies provided by
law.

          Section 7.4.   Expenses; Documentary Taxes.  The Borrower shall
                         ---------------------------
forthwith on demand pay all out-of-pocket expenses incurred by the Pledgee,
including fees and disbursements of its counsel and agents, in connection with
the preparation and administration of this Pledge Agreement or the
administration, sale or other disposition of the Pledged Collateral or the
preservation, protection or defense of the rights of the Pledgee in and to the
Pledged Collateral.  The Borrower shall forthwith pay on demand the amount of
any taxes which the Pledgee may have been required to pay by reason of the
security interests granted in the Pledged Collateral (including any applicable
transfer taxes) or to free any of the Pledged Collateral from the lien thereof.

          Section 7.5.   Successors and Assigns.  This Pledge Agreement is for
                         ----------------------
the benefit of the Pledgee and its successors and assigns, and in the event of
an assignment of all or any of the Obligations, the rights hereunder, to the
extent applicable to the indebtedness so assigned, may be transferred with such
indebtedness.  This Pledge Agreement shall be binding upon the Borrower and its
successors and assigns.

          Section 7.6.   Amendments and Waivers.  Any provision of this Pledge
                         ----------------------
Agreement may be amended or waived, if, but only if, such amendment or waiver is
in writing and is signed by the Borrower and the Pledgee.

          Section 7.7.   Delivery and Virginia Law.  This Pledge Agreement has
                         -------------------------
been delivered in the Commonwealth of Virginia and shall be governed by and
construed in accordance with the laws of the Commonwealth of Virginia, except as
otherwise required by mandatory provisions of law and except to the extent that
remedies provided by the laws of any jurisdiction other than Virginia are
governed by the laws of such jurisdiction.

                                       13
<PAGE>

          Section 7.8.   Limitation by Law; Severability.
                         -------------------------------

          (a)   All rights, remedies and powers provided in this Pledge
Agreement may be exercised only to the extent that the exercise thereof does not
violate any applicable provision of law, and all the provisions of this Pledge
Agreement are intended to be subject to all applicable mandatory provisions of
law which may be controlling and be limited to the extent necessary so that they
will not render this Pledge Agreement invalid, unenforceable in whole or in
part, or not entitled to be recorded, registered or filed under the provisions
of any applicable law.

          (b)   If any provision hereof is invalid and unenforceable in any
jurisdiction, then, to the fullest extent permitted by law, (i) the other
provisions hereof shall remain in full force and effect in such jurisdiction and
shall be liberally construed in favor of the Pledgee in order to carry out the
intentions of the parties hereto as nearly as may be possible; and (ii) the
invalidity or unenforceability of any provision hereof in any jurisdiction shall
not affect the validity or enforceability of such provision in any other
jurisdiction.

          Section 7.9.   Counterparts; Effectiveness.  This Pledge Agreement may
                         ---------------------------
be signed in any number of counterparts, each of which shall be an original,
with the same effect as if the signatures thereto and hereto were upon the same
instrument.  This Pledge Agreement shall become effective when the Pledgee shall
have received counterparts hereof signed by itself and the Borrower.

          IN WITNESS WHEREOF, the parties hereto have caused this Pledge
Agreement to be duly executed by their respective authorized officers as of the
day and year first above written.

Address:  8000 Towers Crescent Drive         MICROSTRATEGY INCORPORATED
          Suite 1400
          Vienna, Virginia 22182

                                             By: _______________________ [SEAL]

Tax I.D. #: _____________________                   Name:
                                                    Title:

                                             BANK OF AMERICA, N.A.
Address: 8300 Greensboro Drive, Suite 550
         McLean, Virginia 22102

                                             By: _______________________ [SEAL]
                                                    Name:
                                                    Title:

                                       14
<PAGE>

                                  Schedule 1
                                  ----------

                               The Listed Assets

          Various Money Market Investment Funds held in the Account.

                                       15<PAGE>

                                 June 29, 2000

Mr. Michael J. Saylor
Alcantara LLC
8000 Towers Crescent Drive
Suite 1400
Vienna, Virginia  22182

      Re:  $25,000,000 Credit Facility (the "Loan") from Bank of America, N.A.
           (the "Lender") to Microstrategy Incorporated (the "Borrower")

Dear Mr. Saylor:

     In consideration for the pledge by the Borrower of certain collateral more
fully described in the Pledge and Security Agreement of even date herewith from
the Borrower for the benefit of the Lender, the Lender has agreed to release and
does hereby release Michael J. Saylor as Guarantor under that certain Guaranty
of Payment dated May 15, 2000 and does hereby release Alcantara LLC, a Delaware
limited liability company ("Alcantara" collectively with Michael J. Saylor, the
"Guarantors") as Guarantor under that certain Guaranty of Payment also dated May
15, 2000.

     In addition, the Lender hereby releases the Pledge and Security Agreement
dated May 15, 2000 (the "Original Pledge") given by Alcantara as Pledgor for the
benefit of the Lender pursuant to which Alcantara had pledged certain
investments held in Account Number 859973 with the Lender as manager.

     This letter once fully signed will be the Bank's authorization and
confirmation that the "control letter" dated May 15, 2000 is also released and
terminated.

     By its signature below, the Borrower shall acknowledge and agree that the
release of the Guarantors and the Original Pledge has been consented to by the
Borrower and that such releases do no in any way affect the Borrower's
obligations under the documents evidencing and securing the Loan.

                                             Sincerely,

                                             /s/ Cheryl D. Fitzgerald

                                             Cheryl D. Fitzgerald
                                             Vice President
<PAGE>

Mr. Saylor
June 29, 2000
Page 2

Acknowledged and agreed to by:

Microstrategy Incorporated

By: /s/ Michael Saylor
    ------------------------
    Name:
    Title:

cc:  Mr. Bradley A. Hughes, Investment Officer

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