Document:

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                                                                     EXHIBIT 4.2

                                FOURTH AMENDMENT

                  FOURTH AMENDMENT (this "Amendment"), dated as of June 8, 2000,
among INFOUSA INC., a Delaware corporation (the "Borrower"), the lenders party
to the Credit Agreement referred to below (the "Lenders"), and BANKERS TRUST
COMPANY, as Administrative Agent (the "Administrative Agent"). All capitalized
terms used herein and not otherwise defined shall have the respective meanings
provided such terms in the Credit Agreement referred to below.

                              W I T N E S S E T H :

                  WHEREAS, the Borrower, the Lenders and the Administrative
Agent are parties to a Credit Agreement, dated as of July 23, 1999 (as amended,
modified or supplemented through, but not including, the date hereof, the
"Credit Agreement");

                  WHEREAS, the Borrower has requested the Lenders to treat, and
the Lenders have agreed to treat, VideoYellowPagesUSA.com, Inc. ("VYP"),
businessCreditUSA.com, Inc. ("BC") and ListBazaar.com, Inc. ("LB"), each
currently a Wholly-Owned Domestic Subsidiary of the Borrower, as additional
Unrestricted Subsidiaries under (and as defined in) the Credit Agreement (after
giving effect to this Amendment) on the terms and conditions set forth herein;
and

                  WHEREAS, the parties hereto wish to amend the Credit Agreement
as herein provided, subject to and on the terms and conditions set forth herein;

                  NOW, THEREFORE, it is agreed:

                  1. Section 8.20 of the Credit Agreement is hereby deleted and
the following new Section 8.20 is inserted in lieu thereof:

                  "8.20 Ownership in Unrestricted Subsidiaries. The Borrower
         and/or a Subsidiary Guarantor will at all times maintain an equity
         ownership interest (on a fully diluted basis) in the capital stock of
         each of info.com, VYP, BC and LB equal to at least 35% of the total
         outstanding capital stock of each such Unrestricted Subsidiary (on a
         fully diluted basis)."

                  2. Section 9.05 of the Credit Agreement is hereby amended by
(i) deleting the word "and" appearing at the end of clause (xv) thereof, (ii)
deleting the period appearing at the end of clause (xvi) thereof and inserting
"; and" in lieu thereof and (iii) inserting the following new clause (xvii) at
the end thereof:

                  "(xvii) the Borrower may contribute the assets of its
         businessCreditUSA.com operating unit to BC."

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                  3. Clause (v) of Section 9.11(a) of the Credit Agreement is
hereby deleted and the following new clause (v) is inserted in lieu thereof:

                  "(v) amend, modify or change any Unrestricted Subsidiary Tax
         Sharing Agreement without the prior written consent of the
         Administrative Agent."

                  4. Section 10.11 of the Credit Agreement is hereby deleted and
the following new Section 10.11 is inserted in lieu thereof:

                  "10.11 Unrestricted Subsidiary Tax Payments. Any Unrestricted
         Subsidiary shall not pay any material amounts owing by it under the
         Unrestricted Subsidiary Tax Sharing Agreement to which it is a party
         and such failure shall continue unremedied for 30 or more days;".

                  5. The definitions of "Unrestricted Subsidiary" and
"Unrestricted Subsidiary Tax Sharing Agreement" appearing in Section 11 of the
Credit Agreement are hereby deleted and the following new definitions of
"Unrestricted Subsidiary" and "Unrestricted Subsidiary Tax Sharing Agreement"
are inserted in lieu thereof:

                  "Unrestricted Subsidiary" shall mean each of info.com, VYP, BC
         and LB and each of their respective Subsidiaries provided that each
         such Person and its Subsidiaries shall only be permitted as
         Unrestricted Subsidiaries so long as (I) no such Unrestricted
         Subsidiary owns any capital stock of, or other equity interests in, or
         has any Lien on any property of, the Borrower or any Subsidiary of the
         Borrower other than a Subsidiary of an Unrestricted Subsidiary, and
         (II) any Indebtedness and other obligations of such Unrestricted
         Subsidiaries are non-recourse to the Borrower or any of its other
         Subsidiaries.

                  "Unrestricted Subsidiary Tax Sharing Agreement" shall mean
         each tax sharing agreement entered into by the Borrower and an
         Unrestricted Subsidiary.

                  6. Section 11 of the Credit Agreement is hereby further
amended by inserting the following new definitions in the appropriate
alphabetical order:

                  "BC" shall mean businessCreditUSA.com, Inc., a Delaware
         corporation.

                  "LB" shall mean ListBazaar.com, Inc., a Delaware corporation.

                  "VYP" shall mean VideoYellowPagesUSA.com, Inc., a Delaware
         corporation.

                  7. In order to induce the Lenders to enter into this
Amendment, the Borrower hereby represents and warrants that (i) the
representations, warranties and agreements contained in Section 7 of the Credit
Agreement are true and correct in all material respects on and as of the Fourth
Amendment Effective Date (as defined in Section 13 of this Amendment), both
before and after giving effect to this Amendment (it being understood and agreed
that any representation or warranty which by its terms is made as of a specified
date shall be required to be true and correct in all material respects only as
of such specified date), (ii) there exists no Default or

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Event of Default on the Fourth Amendment Effective Date, both before and after
giving effect to this Amendment, and (iii) each of VYP, BC and LB is permitted
to be designated as an "Unrestricted Subsidiary" for purposes of, and as defined
in, the Senior Subordinated Note Indenture.

                  8. Upon the occurrence of the Fourth Amendment Effective Date,
the Lenders hereby agree that each of VYP, BC and LB shall be released from all
of its obligations under the Credit Documents to which it is a party and all
liens on their assets also shall be released from the Security Documents.

                  9. In order to induce the Lenders to enter into this
Amendment, the Borrower hereby agrees to pay to each Lender which executes and
delivers to the Administrative Agent a counterpart of this Amendment on or
before 5:00 p.m. (New York time) on June 21, 2000, a fee equal to .05% of the
sum of (I) such Lender's Revolving Loan Commitment on the Fourth Amendment
Effective Date and (II) the aggregate outstanding principal amount of such
Lender's Term Loans on the Fourth Amendment Effective Date, with such fee to be
earned on the Fourth Amendment Effective Date and payable on the Business Day
immediately thereafter.

                  10. This Amendment is limited as specified and shall not
constitute a modification, acceptance or waiver of any other provision of the
Credit Agreement or any other Credit Document.

                  11. This Amendment may be executed in any number of
counterparts and by the different parties hereto on separate counterparts, each
of which counterparts when executed and delivered shall be an original, but all
of which shall together constitute one and the same instrument. A complete set
of counterparts shall be lodged with the Borrower and the Administrative Agent.

                  12. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE
PARTIES HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW
OF THE STATE OF NEW YORK.

                  13. This Amendment shall become effective on the date (the
"Fourth Amendment Effective Date") when (i) the Borrower and the Required
Lenders shall have signed a counterpart hereof (whether the same or different
counterparts) and shall have delivered (including by way of facsimile
transmission) the same to the Administrative Agent at the Notice Office and (ii)
the Unrestricted Subsidiary Tax Sharing Agreements with VYP, BC and LB shall
have been entered into on terms and conditions satisfactory to the
Administrative Agent.

                  14. From and after the Fourth Amendment Effective Date, all
references in the Credit Agreement and each of the Credit Documents to the
Credit Agreement shall be deemed to be references to the Credit Agreement as
amended hereby.

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                  IN WITNESS WHEREOF, each of the parties hereto has caused a
counterpart of this Amendment to be duly executed and delivered as of the date
first above written.

                                      INFOUSA INC.

                                      By:   /s/ STORMY L. DEAN
                                         ---------------------------------------
                                         Name:  Stormy L. Dean
                                         Title: Chief Financial Officer

                                      BANKERS TRUST COMPANY,
                                        Individually and as Administrative Agent

                                      By:   /s/ DAVID J. BELL
                                         ---------------------------------------
                                         Name:  David J. Bell
                                         Title: Principal

                                      US BANK NATIONAL ASSOCIATION

                                      By:   /s/ KEVIN D. MUNRO
                                         ---------------------------------------
                                         Name:  Kevin D. Munro
                                         Title: Vice President

                                      UNION BANK OF CALIFORNIA, N.A.

                                      By:   /s/ HAGOP V. JAZMADARIAN
                                         ---------------------------------------
                                         Name:  Hagop V. Jazmadarian
                                         Title: Vice President

                                      [AND OTHER PARTICIPATING LENDERS]<PAGE>   1

                                                                    EXHIBIT 10.1

                              EMPLOYMENT AGREEMENT

         THIS EMPLOYMENT AGREEMENT (the "Employment Agreement") is entered into
as of the 9th day of May, 2000 between Stormy L. Dean (the "Employee") and
infoUSA Inc. ("Company").

         WHEREAS, the Company wishes to employ the Employee as Chief Financial
Officer of the Company on the terms set forth in this Employment Agreement, and
the Employee wishes to accept such employment on such terms.

         THEREFORE, in consideration of the mutual promises set forth herein, it
is mutually agreed between the parties as follows:

         Section 1. EMPLOYMENT AND TERM. The Company hereby employs the Employee
and the Employee hereby accepts employment as Chief Financial Officer on the
terms of this Employment Agreement, and continuing for a period of three years
from the date first written above, unless terminated earlier in accordance with
the provisions of Section 5 hereof or extended by mutual agreement of the
parties. This Agreement shall thereafter continue in effect from year to year
unless altered or terminated as hereinafter provided.

         Section 2. DUTIES AND AUTHORITY. The Employee's duties shall be as
determined by the Chief Executive Officer of the Company from time-to-time.
Employee agrees, unless otherwise specifically authorized by the Company, to
devote his full time and effort to his duties for the profit, benefit and
advantage of the business of the Company. Employee hereby confirms that he is
under no contractual commitments inconsistent with his obligations set forth in
this Agreement and that during the term of this Agreement he shall not render or
perform services for any other corporation, firm, entity or person.

         Section 3. COMPENSATION.

                  (a) Base Salary. The Employee will receive a base salary
         during the term of this Employment Agreement of $210,000 per year
         ("Base Salary"), payable bi-weekly.

                  (b) Bonus. In the event the Employee is entitled to a bonus,
         any such bonus will be determined at the sole discretion of the
         Company's Chief Executive Officer and the Board of Directors.

                  (c) Additional Benefits. The Employee will receive such
         additional employee benefits as the Company may from time to time make
         available to its executive officers, including paid vacations, pension
         benefits, qualified profit-sharing plans, employee group health and
         life insurance and disability insurance.

                  (d) Withholdings. All payments made to the Employee pursuant
         to this Employment Agreement shall be reduced by all required federal,
         state and local withholdings for taxes and similar charges and by all
         contributions or payments required

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         to be made by the Employee in connection with any employee benefit plan
         maintained by the Company.

                  (e) Options. The Employee will be granted an option to
         purchase 75,000 shares of infoUSA Inc.'s common stock at the closing
         price on the date of execution of this Agreement. Such options will be
         granted under the terms of the infoUSA 1997 Stock Option Plan.

         Section 4. REIMBURSEMENT FOR EXPENSES. The Employee is expected to
incur certain expenses on behalf of the Company for travel, promotion,
telephone, entertainment and similar items. The Company will reimburse the
Employee for all pre-approved expenses incurred by the Employee, which amounts
shall be payable promptly upon receipt of reasonable written documentation
signed by the Employee itemizing such expenses in accordance with the Company's
purchasing, travel and entertainment policies.

         Section 5. EARLY TERMINATION OF TERM; SEVERANCE PAYMENT. This
Employment Agreement shall terminate for "cause" prior to the date of
termination set forth in Section 1 above upon the first to occur of:

                  (a) the determination by the Chief Executive Officer in its
         discretion reasonably applied that the Employee has become disabled and
         shall not be able to continue his service to the Company;

                  (b) the Employee's death; or

                  (c) the Employment Agreement is terminated by the Company by
         reason of the Employee's (i) fraud, misappropriation or embezzlement,
         (ii) conviction of a felony or a gross misdemeanor, (iii) gross
         negligence in the performance of his duties, (iv) willful misconduct,
         (v) material breach of this Agreement or (vi) other act which can be
         reasonably expected to cause substantial economic or reputational
         injury to the Company.

                  Upon termination by the Company for any reason other than
         "cause," Employee will be entitled to receive Employee's Base Salary
         payable in equal bi-weekly payments in accordance with the Company's
         payroll schedule over a maximum of 18 months, provided, however, that
         payment of Employee's Base Salary will immediately terminate upon the
         latter of six months following the termination of Employee's employment
         or the date the Employee becomes employed by another entity (the
         "Severance Period"), but in no event will the period of compensation
         extend beyond the Term of this Agreement. For purposes of this Section
         5, if Employee's duties and responsibilities with the Company are
         significantly reduced by the Company without the prior written consent
         of Employee, Employee may terminate his employment and receive his Base
         Salary during the Severance Period. Upon termination for "cause" or
         Employee voluntarily terminates his employment with the Company, all
         payments otherwise due under this Employment Agreement shall terminate
         and no future amounts, including bonuses, shall be owed to Employee.

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         Section 6. RESTRICTIVE COVENANT. Employee expressly covenants and
agrees that at no time during the effective time of this Employment Agreement
and for a period of one year after termination of this Employment Agreement will
he for himself or on behalf of any other person, partnership, firm, association
or corporation in any territory in which the Company has an active business or
has plans, known to Employee, (1) open or operate a business which would be a
competitor of the Company, (2) act as an employee, agent, advisor or consultant
of any then existing competitor of the Company, (3) solicit or accept business
from any of the Company's competitors, unless authorized by the Company, (4)
divert any business from the Company by influencing or attempting to influence
any present customers or the Company or (5) attempt to attract any supplier away
from the Company or use its information regarding the Company's suppliers in any
way which would detrimentally affect the Company. Employee further covenants and
agrees that for one year following the termination of this Employment Agreement,
whether such termination is voluntary or involuntary, he will not for himself or
on behalf of any other person, partnership, firm, association or corporation in
any territory in which the Company has actively done business during the 12
months immediately prior to this Employment Agreement's termination (1) directly
or indirectly solicit or accept business from any of the Company's present
customers or customers it serviced in said territory within the last 12 months
of the effective term of this Employment Agreement, (2) divert any business from
the Company by influencing or attempting to influence any present customers of
the Company or (3) attempt to attract any supplier away from the Company or use
its information regarding the Company's suppliers in any way which would
detrimentally affect the Company.

                  During the term of this Agreement and for a period of one year
thereafter, Employee shall not, directly or indirectly, solicit, induce or
encourage any of the Company's employee(s) to terminate their employment with
the Company or to accept employment with any competitor, supplier or customer of
the Company, nor shall Employee cooperate with any others in doing or attempting
to do so.

                  By signing this Employment Agreement, Employee expressly
acknowledges that the territorial limitations, duration and scope of this
section are fair and reasonable. If this section 6 of the Employment Agreement
is found or held to be unreasonable by a court of competent jurisdiction,
Employee and the Company expressly agree that the maximum territorial
limitations, duration and scope reasonable under the circumstances shall be
substituted for the objectionable provisions. This section shall survive the
termination of the Employment Agreement.

                  Employee further covenants and agrees that during the time of
this Employment Agreement and for a period of five years after its termination
that he shall not disclose any Confidential Information (as hereinafter defined)
and (i) shall not permit any third party access to the Confidential Information,
(ii) shall use the same degree of care to protect the Confidential Information
as the Company uses to protect its Confidential Information and (iii) shall take
any other actions that are reasonable, necessary or appropriate to ensure the
continued confidentiality and protection of the Confidential Information. The
foregoing confidentiality obligation shall not apply to information that (i) is
or becomes part of the public domain other than as a result of a breach of this
agreement, or (ii) is required to be disclosed by law or regulation or pursuant
to an order by any court or tribunal of competent jurisdiction. "Confidential
Information" shall be

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defined as customer lists, trade secrets, business plans, financial reports and
any other information which would be detrimental to the Company if disclosed to
competitors or to any other third party.

                  Employee further agrees that the Company shall be entitled to
maintain proceedings in any court of competent jurisdiction in Nebraska, either
at law or in equity, for any breach of this Employment Agreement by Employee, to
seek injunctive relief, to enforce the specific performance of this Agreement
and/or to obtain damages for any breach thereof, and without regard to any or
all remedies sought by the Company, the prevailing party shall be entitled to
recover reasonable attorneys' fees incurred in enforcing this Employment
Agreement.

         Section 7. RELOCATION. There is no expectation for the Employee to
relocate outside the Omaha, Nebraska area.

         Section 8. OWNERSHIP OF PROPERTY. Employee agrees that all works of
authorship developed, authored, written, created or contributed to during the
term of this Agreement for the benefit of the Company, whether solely or jointly
with others, shall be considered works-made-for-hire. Employee agrees that such
works shall be the sole and exclusive property of the Company (or an appropriate
affiliate of the Company) and that all right, title and interest therein and
thereto, including all intellectual property rights existing or obtained in
connection therewith, shall likewise be the sole and exclusive property of the
Company (or such other appropriate affiliate of the Company). Employee agrees
further that, in the event that any work is not considered to be
work-made-for-hire by operation of law, Employee will immediately, and without
further compensation, assign all of Employee's right, title and interest therein
to the Company (or any affiliate of the Company which it may designate). At the
request and expense of the Company, Employee agrees to perform in a timely
manner such further acts as may be necessary or desirable to transfer, defend or
perfect the Company's ownership of such work and all rights incident thereto.

         Section 9. AMENDMENTS. No change, modification, waiver, discharge,
amendment or addition to this Employment Agreement shall be binding unless it is
in writing and signed by the Company and the Employee.

         Section 10. ENTIRE AGREEMENT. This Employment Agreement contains the
entire understanding and agreement between the Company and the Employee and
supersedes any prior agreements between them pertaining to the Employee's
employment with the Company. There are no representations, warranties, promises,
covenants or understandings between the Company and the Employee with respect to
such employment other than those expressly set forth in this Employment
Agreement.

         Section 11. GOVERNING LAW. This Employment Agreement shall be governed
by the substantive laws of the State of Nebraska.

         Section 12. NONASSIGNABILITY; SUCCESSORS. The obligations of the
Employee under this Employment Agreement are not assignable by him. Except as
provided in the immediately

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preceding sentence, this Employment Agreement shall be binding upon and inure to
the benefit of the parties hereto and their successors.

         Section 13. NOTICES. Any notice required to be given in writing by any
party to this Employment Agreement may be personally delivered or mailed by
registered or certified mail to the last known address of the party to be
notified. Any such notice personally delivered shall be effective upon delivery
and any such notice mailed shall be effective four business days after the date
of mailing, by registered or certified mail with postage prepaid to the last
known address of the party to be notified.

         Section 14. SEVERABILITY. The invalidity or unenforceability of any
particular provision of this Employment Agreement shall not affect the other
provisions of this Employment Agreement, and this Employment Agreement shall be
construed in all respects as if such invalid or unenforceable provision were
omitted.

         Section 15. HEADINGS. The section and other headings contained in this
Employment Agreement are for reference purposes only and shall not affect the
interpretation of this Employment Agreement.

         Section 16. CONSTRUCTION. Whenever required by the context, references
to the singular shall include the plural, and the masculine gender shall include
the feminine gender.

         IN WITNESS WHEREOF, the Company has caused this Employment Agreement to
be executed on its behalf and the Employee has signed his name hereto, effective
as of the date first written above.

                                  infoUSA Inc.

                                  By
                                    --------------------------------------------

                                  Printed Name
                                              ----------------------------------

                                  Its
                                     -------------------------------------------

                                  ----------------------------------------------
                                  Stormy L. Dean, Employee

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