Document:

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                                EMPLOYMENT AGREEMENT

THIS EMPLOYMENT AGREEMENT (this "Agreement") is made and entered into as of
September 9, 1999, by and among 3D SYSTEMS CORPORATION, a Delaware corporation
("3D Delaware"), 3D SYSTEMS, INC., a California corporation ("3D California"),
and ARTHUR B. SIMS ("Sims").  3D Delaware and 3D California are collectively
referred to herein as the "Corporation."

                                  R E C I T A L S

     A.   The Corporation desires to continue the employment of Sims as an
employee and to arrange for his engagement as a consultant to the Corporation,
and Sims desires to accept such engagement, to perform the services and
undertake the duties described herein.

     B.   The Corporation and Sims wish to formalize their relationship by
entering into a written agreement setting forth the terms and conditions of such
engagement.

     NOW, THEREFORE, in consideration of the mutual covenants herein set forth,
the parties agree as follows:

                                 A G R E E M E N T

     1.   EMPLOYMENT.

          The Corporation hereby employs Sims, and Sims hereby agrees to serve
the Corporation as a senior executive of 3D California.

     2.   TERM.

          Subject to the provisions of this Agreement and subject to Section 5
of this Agreement, Sims shall remain employed by the Corporation as a senior
executive through December 31, 2000 (the "Employment Term").  Following such
date, Sims shall become a Consultant to the Corporation upon the terms set forth
in Section 8 (the "Consulting Term").

     3.   SALARY AND BENEFITS.

          (a)  SALARY.  For his services to be rendered to 3D California under
this Agreement during the Employment Term, 3D California shall pay to Sims a
salary at the

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rate of $317,250 per year, to be paid in accordance with 3D California's
customary payroll procedures.

          (b)  BENEFITS.  3D California shall make available to Sims all fringe
benefits (including, without limitation, all pension, profit-sharing,
disability, health and welfare plans, and all disability income, medical and
hospital insurance), which 3D California may from time to time afford, during
the Employment Term, its executive employees generally.  The actual dollar
amount of the salary payable under this Section 3 or under Section 8 of this
Agreement, as may be applicable under the circumstances, and the value of all
fringe benefits, are collectively referred to in this Agreement as
"Compensation".

          (c)  STOCK OPTIONS.  On January 1, 2000, Sims shall be granted a stock
option for 25,000 shares.  The option price thereof shall be the Sims Exercise
Price (as that term is defined in the May 19, 1999 Minutes of the Meeting of the
Compensation Committee of 3D Delaware).  Said stock option shall be by agreement
in substantially the form then in use by 3D Delaware, except for the foregoing
calculation of price, and for the inclusion therein of a provision accelerating
the vesting thereof by a "change of control" provision.

          As of January 1, 2001, all remaining unvested share options previously
granted to Sims, including the share options in the amount of 25,000 shares,
granted pursuant to this Section 3(c), shall immediately vest and, pursuant to
the terms of this Agreement, survive during the Consulting Term.

          (d)  EXPENSES.  Sims will be reimbursed for necessary, customary
and/or usual expenses in accordance with 3D California's policies generally in
effect from time to time with respect to its executive employees or business
consultants, as applicable.

     4.   DUTIES.

          During the Employment Term, Sims will report to the Chief Executive
Officer of the Corporation (the "CEO"), and will devote substantially all of his
business time, energy and skill to the business of the Corporation and the
promotion of its interests (vacations and absences because of sickness
excepted).  Sims will not engage in or be concerned with any other material
business activities, directly or indirectly, including directorships in other
companies (whether or not in competition with the Corporation) except those in
place as of the date hereof and those activities approved in each case by the
CEO.  This Section 4 shall not be interpreted to restrict Sims' ability to
manage his own assets during business hours, so long as such activities do not
detract from the time spent by him in performing his duties hereunder.

     5.   TERMINATION.

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          (a)  FOR JUST CAUSE.  Sections 1 through 4 and 6, 8 and 9 of this
Agreement may be terminated by the Corporation at any time during the term of
this Agreement for "just cause."  As used in this Agreement, just cause shall
exist upon (i) any material breach by Sims of this Agreement or his duties
hereunder, or Sims' refusal to perform his material duties and obligations, in
each case after notice and reasonable opportunity to cure, or (ii) Sims'
conviction of any crime involving embezzlement or misappropriation of funds or
property of the Corporation or felonious conduct.

          (b)  TERMINATION UPON DEATH OR DISABILITY.

               (i)  Sections 1 through 4 and 6, 8 and 9 of this Agreement shall
cease and terminate promptly upon the death of Sims.

               (ii) If in the opinion of the Board of Directors of 3D Delaware,
based upon consultation with or a report of a qualified physician or
psychiatrist (as evidenced by a resolution duly adopted subsequent to the end of
the six consecutive month period referred to below) Sims shall become physically
or mentally incapacitated and as a result thereof shall become unable to
continue the proper performance of his duties hereunder during the Consulting
Term and/or the Employment Term (reasonable vacations and reasonable absences
because of sickness, including such physical or mental incapacitation, for up to
six consecutive months, excepted), Sections 1 through 4 and 6, 8 and 9 of this
Agreement shall cease and terminate 15 days following adoption of a resolution
by the Board of Directors of 3D Delaware confirming Sims' termination.

          (c)  BENEFITS UPON TERMINATION.  If the Employment Term or Consulting
Term is terminated pursuant to Section 5(a) or Section 5(b) hereof, Sims shall
be entitled to Compensation up to the date of termination, LESS any amounts
received by Sims with respect to such period from any disability insurance or
similar plan maintained by the Corporation.

     6.   FACILITIES.

          Sims shall at all times during the Employment Term be furnished with
an executive office, stenographic and other necessary clerical assistance, and
such other facilities, amenities and services as are suitable to Sims' position
with the Corporation and adequate for the performance of his duties hereunder.

     7.   NONSOLICITATION; TRADE SECRETS.  Sims shall not, directly or
indirectly:

          (a)  for a period of four years following termination of the
Employment Term or Consulting Term, as applicable, cause or induce, or attempt
to cause or induce, any present or future employee of the Corporation or any
affiliate thereof to terminate his or her employment with the Corporation;

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          (b)  for a period of four years following termination of the
Employment Term or Consulting Term, as applicable, directly or indirectly
solicit, induce or influence any present, future or specifically identifiable
potential customer, employee, licensor, sales representative, supplier, lender,
lessor, factor or any other person which on the date of termination of the
Employment Term or Consulting Term, as applicable, has an existing or
specifically identifiable potential business relationship with the Corporation
to discontinue, reject, reduce the extent of, or otherwise adequately modify
such relationship; or

          (c)  directly or indirectly disclose to any person (other than in the
course of performing his duties for the Corporation) or use or exploit for the
benefit of any person other than the Corporation, any trade secrets, customer
and supplier lists, marketing arrangements, business plans, projections,
financial information, training manuals, pricing manuals, product and service
development manuals, market strategies, internal performance statistics and
other competitively sensitive information concerning the Corporation and its
affiliates which is material to the Corporation and its affiliates and which is
not generally known or available to the public, whether or not in written or
tangible form.

     8.   CONSULTING.

          (a)  CONVERSION OF DUTIES.  As of January 1, 2001, (the "Effective
Date"), Sims' duties and obligations under Sections 1 and 4 hereof shall convert
to those set forth in this Section 8 (the "Conversion").

          (b)  EFFECT OF CONVERSION.  Upon Conversion, (i) Sections 1, 2, 3(a),
and 4 shall terminate as of the Effective Date; and (ii) assuming this Agreement
has not been earlier terminated pursuant to Section 5 hereof, Sections 8(c)
through 8(i) shall govern the rights and obligations of the parties hereto with
respect to the matters covered by such subsections during the Consulting Term.

          (c)  ENGAGEMENT.  As of the Effective Date, the Corporation agrees to
and hereby does retain and engage Sims as a Consultant, and Sims agrees to
accept such engagement by the Corporation on the terms and subject to the
conditions hereinafter set forth in this Section 8.

          (d)  CONSULTING TERM; BENEFITS UPON TERMINATION PRIOR TO END OF
CONSULTING TERM.  The engagement of Sims as a Consultant hereunder shall
commence as of the Effective Date and shall continue until that date which is
four years after the Effective Date (the "Consulting Term").

          (e)  CONSULTING DUTIES.  Commencing on the Effective Date, Sims shall
be engaged by the Corporation as a business consultant.  His duties in such
capacity shall be to consult with the Board of Directors and officers of the
Corporation and its subsidiaries at such reasonable times as the CEO may request
concerning those

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aspects of the business and affairs of the Corporation with which Sims has
heretofore been concerned and such other matters as the CEO may reasonably
request, to meet with and aid in the retention of the existing and future
clients of the Corporation, to assist the Corporation in marketing and corporate
development and otherwise to assist the Corporation in the maintenance of its
goodwill.  Without limiting the generality of the foregoing, such duties shall
include (i) aiding the management of the Corporation in maintaining good
relationships with its employees at all levels; (ii) meeting with customers,
discussing their problems and complaints and proposing solutions to resolve any
problems or complaints which they may have; (iii) aiding in the continued
development and establishment of long-range planning of the business and affairs
of the Corporation; and (iv) protecting and preserving the established goodwill
of the Corporation.

          (f)  EXTENT AND PLACE OF SERVICES.  Sims shall not be required during
the Consulting Term to devote more than 150 hours per fiscal quarter to the
performance of his consulting duties hereunder.  The Corporation may, however,
request that Sims devote more than 150 hours during any fiscal quarter to the
performance of his duties hereunder.  If Sims, in his discretion, accepts such
request, the Corporation shall compensate Sims, in addition to all other
compensation provided to him under this Section 8, at the rate of two hundred
fifty dollars ($250.00) per hour for all hours exceeding 150 hours during such
quarter devoted by him to the performance of his consulting services to the
Corporation hereunder.  Sims' duties hereunder shall be performed at the
executive offices of the Corporation or at such other place or places in Los
Angeles County as shall be reasonably requested b the Corporation from time to
time.

          (g)  COMPENSATION.  As compensation for Sims' services under this
Section 8 during the Consulting Term, the Corporation shall pay Sims the sum of
one hundred fifty thousand dollars ($150,000.00) per year during the Consulting
Term, payable bi-weekly.

          (h)  OTHER ACTIVITIES.  During the Consulting Term, Sims shall be
permitted to accept employment from others, but only to the extent that (i) such
additional activities are not otherwise prohibited by the terms of this
Agreement, and (ii) such other activities do not impair the ability of Sims
fully and completely to discharge all of his duties hereunder.

          (i)  INDEPENDENT CONTRACTOR.  It is the intention and understanding of
the parties hereto that from and after the Effective Date and during the
Consulting Term, Sims will and at all times shall remain an independent
contractor and nothing contained herein shall be deemed or construed to create
the relationship of employer and employee as between the Corporation and Sims.
Without limiting the generality of the foregoing:

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               (A)  All final decisions with respect to matters as to which Sims
has provided consulting services hereunder shall be solely those of the
management of the Corporation and Sims shall have no liability relating thereto
or arising therefrom; and

               (B)  In payment of the compensation to Sims provided for in this
Section 8, the Corporation shall have the right (but not the obligation) to make
any deduction from such payments on account of federal or state income tax
withholdings, disability, unemployment insurance or social security payments or
any other reductions of salary or wage payments applicable to the compensation
of employees generally.

          (j)  BENEFITS.  During the Consulting Term, subject only to early
termination thereof, the Corporation shall provide Sims with continuation of
such life insurance and health insurance benefits as were provided immediately
prior to the inception of the Consulting Term.

     9.   CERTAIN EVENTS.

          (a)  CHANGE OF CONTROL.

               (i)  Upon the occurrence of any of the following events (each, a
"Triggering Event") during the Employment Term, the Corporation shall pay to
Sims a special bonus (the "Special Bonus") as calculated in accordance with
Section 9(a)(ii):  (A) the acquisition of one or more shares of "Common Stock"
of 3D Delaware or 3D California by an "Acquiring Person" (each as defined in
Section 9(c)); (B) the consolidation with, or merger with or into, any other
"Person" (as defined in Section 9(c)), by 3D Delaware and, in connection with
such merger or consolidation, 3D Delaware is not the continuing or surviving
entity; (C) the consolidation with, or merger with or into, any other Person by
3D California and, in connection with such merger or consolidation, 3D
California is not the continuing or surviving entity; (D) the sale or transfer
by other means by the Corporation in one transaction or a series of related
transactions, of assets or earning power aggregating more than 50% of the assets
or earning power of the Corporation (taken as a whole and calculated on the
basis of the Corporation's most recent regularly prepared financial statements)
to any other Person or Persons (but excluding from this subsection 9(a)(i)(D)
sales of inventory in the ordinary course of business); or (E) individuals who
were members of the Board of Directors of 3D Delaware immediately prior to a
meeting of the stockholders of 3D Delaware involving a contest for the election
of directors shall not constitute a majority of the Board of Directors of 3D
Delaware immediately following such election; PROVIDED, that the following
transactions shall not be deemed to be a Triggering Event for purposes of this
Agreement; (x) the dissolution and liquidation of the assets of 3D Systems
(Canada), Inc. ("3D Canada") into, or merger 3D Canada with and into, the
Corporation or any of its subsidiaries; or (y) the merger of 3D California with
and into 3D Delaware.

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               (ii) The bonus payable to Sims upon the occurrence of any of the
Triggering Events shall be the lesser of (A) $1,000,000; (B) the maximum amount
(when aggregated with other payments received by Sims related to the occurrence
of a Triggering Event) that could be paid without the Special Bonus being
subject to excise tax under Section 4999 of the Internal Revenue Code of 1986,
as amended (the "Code"); or (C) 7.5% of the difference between (1) the "Market
Value of 3D Delaware" (as defined in Section 9(c)) on the date the transaction
giving rise to the Triggering Event is consummated, and (2) the Market Value of
3D Delaware on the date of this Agreement, but in no event shall this clause (C)
result in a Special Bonus of less than the maximum amount (when aggregated with
all other "applicable employee renumeration," as calculated in accordance with
Section 162(m) of the Code during the year the Special Bonus is paid) that could
be paid without the Special Bonus being subject to the limitation on deductions
set forth in Section 162(m)(i) of the Code.  All references in this Section 9(a)
to Section 162(m) of the Code, or any subsections thereof, shall refer to such
section, and the regulations and interpretations of the Internal Revenue Service
with respect thereto, in existence on the date of this Agreement, and the rights
of Sims to receive a Special Bonus, and the calculation of the amount of the
Special Bonus, shall not be reduced or diminished as a result of amendments or
changes to such section, or such regulations or interpretations, hereafter
enacted or promulgated.  All payments due to Sims under this Section 9 shall be
payable by the Corporation upon the consummation of the transaction giving rise
to the Triggering Event.

          (b)  DETERMINATION OF "CONTINUING" OR "SURVIVING" CORPORATION.  The
determination as to which party to a merger or consolidation is the "continuing"
or "surviving" corporation shall be made on the basis of the relative equity
interests of the shareholders in the corporation existing after the merger or
consolidation, as follows:  if following any merger or reorganization, the
holders of outstanding Common Stock of 3D California or 3D Delaware immediately
prior to the merger or consolidation Beneficially Own more than fifty percent
(50%) of the Common Stock of the corporation existing following the merger or
consolidation, then for purposes of this Agreement, 3D California or 3D
Delaware, as the case may be, shall be the survivor or continuing corporation.
In making the determination of Beneficial Ownership by the shareholders of a
corporation immediately after the merger or consolidation, of equity securities
which the shareholders owned immediately before the merger or consolidation,
shares which they Beneficially Owned as shareholders of another party to the
transaction shall be disregarded.

          (c)  DEFINITIONS.  For the purposes of this Section 9, the following
definitions shall apply:

          "Acquiring Person" shall mean (i) any Person who or which, together
with all Affiliates and Associates of such Person, is not, as of the date
hereof, a Beneficial Owner of 5% or more of the Common Stock of 3D Delaware,
becomes the Beneficial Owner (as hereinafter defined) of at least 50% of the
Common Stock of the Corporation

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or (ii) any Person who or which, together with all Affiliates and Associates of
such Person, as of the date of this Agreement is the Beneficial Owner of 5% or
more of the Common Stock of 3D Delaware, becomes the Beneficial Owner of at
least 80% of the Common Stock of the Corporation.  Acquiring Person shall not
include 3D Delaware, 3D California, 3D Holdings, LLC or 3D Canada, any employee
benefit plan of the Corporation or any entity holding Shares which was
organized, appointed or established by the Corporation for or pursuant to the
terms of any such plan.

          "Affiliate" and "Associate" shall have the respective meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations under
the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and as in
effect on the date hereof.

          A person shall be deemed the "Beneficial Owner" of, and shall be
deemed to "beneficially own," any securities:  (i) which such Person or any of
such Person's Affiliates or Associates, directly or indirectly, beneficially
owns (as determined pursuant to Rule 13d-3 of the General Rules and Regulations
under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), as
in effect on the date of this Agreement, or has the right to dispose of; (ii)
which such Person or any of such Person's Affiliates or Associates has, directly
or indirectly, (A) the right to acquire (whether such right is exercisable
immediately or only after the passage of time) pursuant to any agreement (other
than customary agreements with and between underwriters and selling group
members with respect to a bona fide public offering of securities), arrangement
or understanding (whether or not in writing), or upon the exercise of conversion
rights, exchange rights, rights, warrants or options, or otherwise; PROVIDED,
HOWEVER, that a Person shall not be deemed the "Beneficial Owner" of or to
"beneficially own" any security under this clause (ii)(B) as a result of an
agreement, arrangement or understanding to vote such security if such agreement,
arrangement or understanding (1) arises solely from a revocable proxy or consent
given to such Person in response to a public proxy or consent solicitation made
pursuant to, and in accordance with, the applicable rules and regulations under
the Exchange Act (or any comparable or successor report); or which are
beneficially owned, directly or indirectly, by any other Person (or any
Affiliate or Associate thereof) with which such Person or any of such Person's
Affiliates or Associates has any agreement (other than customary agreements with
and between underwriters and selling group members with respect to a bona fide
public offering of securities), arrangement or understanding (whether or not in
writing) for the purpose of acquiring, holding, voting (except pursuant to a
revocable proxy as described in Section 9(c)(ii)(B)) or disposing of any Common
Stock of the Corporation.

          "Common Stock" of a Person shall mean the common stock (or, in the
case of a trust, partnership or other unincorporated entity, the equivalent
equity interest) with the greatest voting power of such Person (or, (i) if such
Person is a Subsidiary of another Person, the Person which ultimately controls
such first-mentioned Person, or (ii) if such Person is ultimately controlled by
two or more Persons, the controlling Person having common stock or equivalent
equity interests with the greatest aggregate current

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market value, together with all rights and benefits (however denominated or
constituted) relating to such common stock (including, without limitation, any
rights or warrants to acquire additional shares of such common stock or other
securities or assets, or to participate in any trust for the benefit of holders
of such shares, or to share in the benefits of any agreements or other
arrangements for the benefit of such holders), whether or not such rights are
yet exercisable, and together with any other securities which are represented by
the certificates for such shares or are transferred in connection with transfers
of such shares.

          "Market Value of 3D Delaware" on any particular date shall be
determined by multiplying the number of shares of Common Stock of 3D Delaware
issued and outstanding on that date by the Market Price of the Common Stock of
3D Delaware on such date.

          "Market Price" of the Common Stock of 3D Delaware on any date shall
mean the closing price per share of such Common Stock on the Trading Day (as
such term is hereinafter defined) immediately prior to such date.  The closing
price shall be the last sale price, regular way, or, in case no such sale takes
place on such day, the average of the closing bid and asked prices, regular way,
in either case as reported in the principal consolidated transaction reporting
system with respect to securities listed or admitted to trading on the New York
Stock Exchange or, if the Common Stock of 3D Delaware is not listed or admitted
to trading on the New York Stock Exchange, as reported in the principal
consolidated transaction reporting system with respect to securities listed on
the principal national securities exchange on which the Common Stock of 3D
Delaware is listed or admitted to trading or, if the Common Stock is not listed
or admitted to trading on any national securities exchange, the last price or,
if not so quoted, the average of the high bid and low asked prices in the
over-the-counter market, as reported by the National Association of Securities
Dealers, Inc. Automated Quotation System ("NASDAQ") or such other system then in
use, or, if on any such date the common stock of 3D Delaware is not quoted by
such organization, the average of the closing bid and asked prices as furnished
by a professional market maker making a market in the Common Stock selected by
the Board of Directors of 3D Delaware.  If on any such date no market maker is
making a market in the Common Stock the fair value of such shares on such date
as determined in good faith by the Board of Directors of 3D Delaware shall be
used.  The term "Trading Day" shall mean a day on which the principal national
securities exchange on which the shares of Common Stock of 3D Delaware are
listed or admitted to trading or traded is open for the transaction of business
or, if the Common Stock is not so listed or admitted to trading on any national
securities exchange, a day on which commercial banks in Los Angeles, California
are open to the public for business.  If the Common Stock is not publicly held
or not so listed or traded, "Market Price" per share shall mean the fair value
per share as determined in good faith by the Board of Directors of 3D Delaware,
or, if at the time of such determination there is an Acquiring Person, by a
nationally recognized investment banking firm selected by the Board of Directors
of 3D Delaware.

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          "Person" shall mean any individual, firm, corporation, trust,
partnership or other entity, whether similar or dissimilar to the foregoing.

          "Subsidiary" or "Subsidiaries" shall mean, as the case may be, with
respect to any Person, any other Person of which securities or other ownership
interests having ordinary voting power, in the absence of contingencies, to
elect a majority of the board of directors or other Persons performing similar
functions are at the time directly or indirectly owned by such first Person.

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     10.  MISCELLANEOUS.

          (a)  WAIVER.  The waiver by any party hereto of a breach of any of the
provisions of this Agreement shall not operate or be construed as a waiver of
any subsequent breach.

          (b)  NOTICE.  Any notice to be given hereunder shall be sent by
certified mail addressed, if to the Corporation, to 3D Systems, Inc., 26081
Avenue Hall, Valencia, California 91355, Attn:  President, or at such other
address as the Corporation shall hereafter specify in writing, or if to Sims to
875 Gold Spring Place, Westlake Village, California 91362, or at such other
address as Sims shall hereafter specify in writing.

          (c)  NO ASSIGNMENT.  This Agreement is personal in its nature and
neither of the parties hereto shall, without the consent of the other, assign or
transfer this Agreement or any rights or obligations hereunder; PROVIDED, if the
Corporation effects any merger, consolidation or transfer or sale of all or
substantially all the assets of the Corporation in a transaction in which the
Corporation is not the surviving entity, this Agreement shall be binding upon
such successor corporation and such successor corporation shall discharge and
perform all the obligations of the Corporation hereunder.

          (d)  ENTIRE AGREEMENT.  This Agreement embodies the entire agreement
of the parties respecting the matters within its scope and may be modified only
in writing.

          (e)  GOVERNING LAW.  THIS AGREEMENT SHALL BE GOVERNED BY THE LAWS OF
THE STATE OF CALIFORNIA.

          (f)  ATTORNEYS' FEES.  If either party hereto brings an action or
proceeding for a declaration of the rights of the parties under injunctive
relief, or for an alleged breach or default of, or any other action arising out
of this Agreement, the prevailing party in any such action shall be entitled to
an aware of the prevailing party's actual attorneys' fees and any court costs
incurred in such action or proceeding, in addition to any other damages or
relief awarded.

          (g)  FEDERAL AND STATE TAX WITHHOLDING.  The Corporation shall have
the right to withhold from Compensation due Sims all amounts necessary to
satisfy applicable federal and state income tax withholding obligations.

          (h)  SEVERABILITY.  In case any provision of this Agreement shall be
invalid, illegal or unenforceable, the validity, legality and enforceability of
the remaining provisions of this Agreement shall not in any way be affected or
impaired thereby.

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          (i)  JOINT AND SEVERAL LIABILITY.  The liability of 3D California and
3D Delaware hereunder for all obligations of the Corporation shall be joint and
several.

          (j)  WARRANTY.  The Corporation warrants that this Agreement has been
approved by the Boards of Directors of 3D California and 3D Delaware.

          (k)  CONFLICTING AGREEMENTS.  The Corporation has provided Sims with
copies of all employment policies and benefit plans relating to his employment
and, in the event that any term specified therein is in conflict with the terms
identified in this Agreement, the terms of this Agreement shall control.

          (l)  TERMINATION OF PRIOR AGREEMENT.  Upon execution of this Agreement
by all parties hereto, as of the date hereof, Sections 1, 2, 3(a) and 4 through
7 of that certain Employment Agreement between the Corporation and Sims dated
October 31, 1994, as amended, shall terminate and be of no further force or
effect and neither the Corporation nor Sims shall have any rights or obligations
under those Sections.

          IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the day and year first above written.

                                   3D SYSTEMS, INC.

______________________________     By:_____________________________
Arthur B. Sims                          A. Sidney Alpert
                                        Vice President, General Counsel

                                   3D SYSTEMS CORPORATION

                                   By:_____________________________
                                        A.   Sidney Alpert
                                        Vice President, General Counsel

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                                 OPTION CERTIFICATE

     THIS IS TO CERTIFY that 3D Systems Corporation, a Delaware corporation (the
"COMPANY"), has granted to the Officer of the Company named below a
non-statutory stock option (the "OPTION") to purchase shares of the Company's
Common Stock (the "SHARES"), and upon the terms and conditions determined by the
Compensation Committee (the "Committee") of the Board of Directors of the
Company (the "BOARD"), as follows:

          NAME OF OPTIONEE:        Arthur B. Sims

          ADDRESS OF OPTIONEE:     c/o 3D Systems Corporation
                                   26081 Avenue Hall
                                   Valencia, CA  91355

          NUMBER OF SHARES:        25,000

          OPTION EXERCISE PRICE:   $ 6.4113(1) per share

          DATE OF GRANT:           May 20, 1999

          OPTION EXPIRATION DATE:  Ten years from the Date of Grant.

     EXERCISE SCHEDULE: The Option shall become exercisable with respect to 25%
of the number of shares subject to this Option (rounded up or down to the
nearest whole number) on each of the first four anniversaries of the Date of
Grant, PROVIDED HOWEVER THAT, in the event of an acquisition by any individual,
entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act") of beneficial
ownership (within the meaning of Rule 13d-3 of the Rules and Regulations of the
Securities and Exchange Commission under the Exchange Act) of at least 51% or
more of the combined voting power of the then outstanding voting securities of
the Company entitled to vote generally in the election of directors, the Option
shall become fully vested and immediately exercisable.   Installments shall be
cumulative, and the Option may be exercised as to any and all shares of Common
Stock covered by an installment at any time after the installment becomes
exercisable and prior to the expiration of termination of the Option.

     OUTSIDE OF 1996 STOCK INCENTIVE PLAN:  The Option has been granted outside
the 1996 Stock Incentive Plan and is not subject to the terms thereof.

     SUMMARY OF OTHER TERMS:  This Option is defined in the Stock Option
Agreement (Non-Statutory Stock Option) (the "OPTION AGREEMENT") which is
attached to this Option Certificate (the "CERTIFICATE") as Annex I.  This
Certificate summarizes certain of the provisions of the Option Agreement for
your information, but is not complete.  Your rights

---------------------
(1) Based on the 115% of the average closing price of the Common Stock over the
ten trading day period following shareholder approval of the amended 1996 Stock
Option Plan.

<PAGE>

are governed by the Option Agreement, NOT by this summary.  The Company strongly
suggests that you carefully review the full Option Agreement prior to signing
this Certificate or exercising the Option.

     Among the terms of the Option Agreement are the following:

     TERMINATION OF EMPLOYMENT:  While the Option terminates on the Option
Expiration Date, it will terminate earlier if you cease to be employed by the
Company or the direct or indirect subsidiary of the Company with whom you are
employed (transfer of employment from one subsidiary to another will not
constitute termination of employment).  If your employment ends due to
retirement or death, the Option terminates eighteen months after the date of
retirement or death, and is exercisable during such eighteen-month period as to
the portion of the Option which had vested prior to the date of retirement or
death.  If your employment ends due to disability, the Option terminates twelve
months after the date of disability, and is exercisable during such twelve-month
period as to the portion of the Option which had vested prior to the date of
disability.  If your employment ends primarily as a result of an act of
misconduct described in Section 5(b) of the Option Agreement, or during the
period when your rights under the Option have been suspended by the Company
pursuant to Section 5(b), the Option will terminate immediately.  In all other
cases, the Option terminates ninety days after the date of termination of
employment, and is exercisable during such time period as to the portion of the
Option which had vested prior to the date of termination of employment.  See
Section 5 of the attached Option Agreement.

     TRANSFER:  The Option is personal to you, and cannot be sold, transferred,
assigned or otherwise disposed of to any other person, except upon your death.
See Section 13(d) of the attached Option Agreement.

     EXERCISE:  You can exercise the Option (while it is exercisable), in whole
or in part, by delivering to the Company a Notice of Exercise identical to
Exhibit "A" attached to the Option Agreement, accompanied by payment of, or
provision pursuant to the Option Agreement for the payment of, the Exercise
Price for the Shares to be purchased.  The Company may require you to submit
certain written reassurances to the Company with respect to your status as a
shareholder.  The Company will then issue a certificate to you for the Shares
you have purchased.  You are under no obligation to exercise the Option. See
Section 4 of the attached Option Agreement.

     RELOAD OPTION:  If and to the extent that the Exercise Price is paid by
delivery of shares of the Company's Common Stock (see Section 4(b) of the
attached Option Agreement), you will automatically be granted a new option (a
"Reload Option") for a like number of shares, with an exercise price equal to
the market value of a share of Common Stock on the date of exercise, and a term
equal to the term of the Option.  See Section 4(d) of the attached Option
Agreement.

<PAGE>

     ADJUSTMENTS UPON RECAPITALIZATION:  The Option contains provisions which
affect your rights in the event of stock splits, stock dividends, mergers and
other major corporate reorganizations.  See Section 6 of the attached Option
Agreement.

     WAIVER:  By signing this Certificate, you will be agreeing to all of the
terms of the Option Agreement, including those not summarized in this
Certificate.  You will waive your rights to options or stock which may otherwise
have been promised to you.  See Section 7 of the attached Option Agreement.

     WITHHOLDING:  The Company may require you to make any arrangements
necessary to insure the proper withholding of any amount of tax, if any,
required to be withheld by the Company as a result of the exercise of the
Option.  See Section 10 of the attached Option Agreement.

<PAGE>

                                 A G R E E M E N T

     3D Systems Corporation, a Delaware corporation, and Optionee each hereby
agrees to be bound by all of the terms and conditions of the Stock Option
Agreement (Non-Statutory Stock Option) which is attached hereto as Annex I and
incorporated herein by this reference as if set forth in full in this document.

DATED:____________________________

                                   3D SYSTEMS CORPORATION

                                   By:__________________________________

                                   Its: Vice President and General Counsel

                                   OPTIONEE

                                   Name:________________________________

                                        _______________________________
                                   (Please print your name exactly as you wish
                                   it to appear on any stock certificates issued
                                   to you upon  exercise of the Option)

<PAGE>

                                      ANNEX I

                               STOCK OPTION AGREEMENT
                            (NON-STATUTORY STOCK OPTION)

     This STOCK OPTION AGREEMENT (this "OPTION AGREEMENT") is made and entered
into on the execution date of the Option Certificate to which it is attached
(the "CERTIFICATE"), by and between 3D Systems Corporation, a Delaware
corporation (the "COMPANY"), and the Officer of the Company named in the
Certificate ("OPTIONEE").

     The Board of Directors of the Company (the "BOARD") has authorized the
grant to Optionee of a non-statutory stock option to purchase shares of the
Company's Common Stock, par value $0.001 per share (the "COMMON STOCK"), upon
the terms and subject to the conditions set forth in this Option Agreement.

     The Company and Optionee agree as follows:

     1.   GRANT OF OPTION.

          The Company hereby grants to Optionee the right and option (the
"OPTION"), upon the terms and subject to the conditions set forth in this Option
Agreement, to purchase all or any portion of that number of shares of the Common
Stock (the "SHARES") set forth in the Certificate, at the Option exercise price
set forth in the Certificate (the "EXERCISE PRICE").

     2.   TERM OF OPTION.

          The Option shall terminate and expire on the Option Expiration Date
set forth in the Certificate, unless sooner terminated as provided herein.  In
no event shall the Option be exercisable after the expiration of ten years from
the date it was granted.

     3.   EXERCISE PERIOD.

          (a)  Subject to the provisions of Sections 3(b) and 5 of this Option
Agreement, the Option shall become exercisable (in whole or in part) upon and
after the dates set forth or referred to under the caption "Exercise Schedule"
in the Certificate.  The installments shall be cumulative; I.E., the Option may
be exercised, as to any or all Shares covered by an installment, at any time or
times after the installment first becomes exercisable and until expiration or
termination of the Option.

<PAGE>

          (b)  Notwithstanding anything to the contrary contained in this Option
Agreement, the Option may not be exercised, in whole or in part, unless and
until any then-applicable requirements of all federal, state and local laws and
regulatory agencies shall have been fully complied with to the satisfaction of
the Company and its counsel.  In addition, if the Company believes that Employee
has committed an Act of Misconduct, including an act of embezzlement, fraud,
nonpayment of any obligation owed to the Company or any subsidiary, breach of
fiduciary duty or deliberate disregard of the Company's rules resulting in loss,
damage or injury to the Company, any unauthorized disclosure of trade secrets or
confidential information of the Company, any conduct constituting unfair
competition, or the inducement of any customer of the Company to breach a
contract with the Company), the Company may suspend the Employee's rights under
the Option pending a determination by the Board of Directors, which shall have
the right, as therein provided, to terminate the Option.

     4.   EXERCISE OF OPTION.

          There is no obligation to exercise the Option, in whole or in part.
The Option may be exercised, in whole or in part, only by delivery to the
Company of:

          (a)  written notice of exercise in form and substance identical to
Exhibit "A" attached to this Option Agreement stating the number of shares of
Common Stock then being purchased (the "PURCHASED SHARES");

          (b)  the Exercise Price for each Purchased Share shall be paid in full
upon exercise and shall be payable in cash in United States dollars (including
check, bank draft or money order); PROVIDED, HOWEVER, that in lieu of cash the
person exercising the Option may pay the Exercise Price in whole or in part by
delivering to the Company shares of the Common Stock having a fair market value
on the date of exercise of the Option, determined as provided in Section 4(c),
equal to the Exercise Price for the Shares being purchased; except that (i) any
portion of the Exercise Price representing a fraction of a Share shall in any
event be paid in cash and (ii) no shares of the Common Stock which have been
held for less than six months may be delivered in payment of the Exercise Price
of an Option.  Delivery of shares may also be accomplished through the effective
transfer to the Company of shares held by a broker or other agent.  The Company
will also cooperate with any person who participates in a cashless exercise
program of a broker or other agent under which all or part of the shares
received upon exercise of the Option are sold through the broker or other agent
or under which the broker or other agent makes a loan to such person.
Notwithstanding the foregoing, the exercise of the Option shall not be deemed to
occur and no shares of Common Stock will be issued by the Company upon exercise
of the Option until the Company has received payment of the Exercise Price in
full.  The date of exercise of an Option shall be determined under procedures
established by the Committee.

          (c)  If payment is made, in whole or in part, by transfer to the
Corporation of issued and outstanding shares of Common Stock, the value of such
shares shall be the mean between the following prices, as applicable, for the
date as of which fair market value is to be

<PAGE>

determined as quoted in THE WALL STREET JOURNAL (or in such other reliable
publication as the Company, in its discretion, may determine to rely upon):  (i)
if the Common Stock is listed on a United States securities exchange, the
highest and lowest sales prices per share of Common Stock for such date on the
principal United States securities exchange on which the Common Stock is listed,
or (ii) if the Common Stock is not listed on any such exchange, the highest and
lowest sales prices per share of the Common Stock for such date on the Nasdaq
National Market or any successor system then in use.  If there are no such sale
price quotations for the date as of which fair market value is to be determined
but there are such sale price quotations within a reasonable period both before
and after such date, then fair market value shall be determined by taking an
average of the means between the highest and lowest sales prices per share of
the Common Stock as so quoted on the nearest date before and the nearest date
after the date as of which fair market value is to be determined.  If there are
no such sale price quotations on or within a reasonable period both before and
after the date as of which fair market value is to be determined, then fair
market value of the Common Stock shall be the mean between the bona fide bid and
asked prices per share of Common Stock as so quoted for such date on Nasdaq, or
if none, the average of the means between such bid and asked prices on the
nearest trading date before and the nearest trading date after the date as of
which fair market value is to be determined, if both such dates are within a
reasonable period.  If the fair market value of the Common Stock cannot be
determined on the basis set forth above, the Committee shall in good faith
determine the fair market value of the Common Stock as of such date.

          (d)  If Employee delivers shares of Common Stock in payment of the
Exercise Price of the Option, as provided in Paragraph 4(b) above, the Employee
shall be automatically granted the additional right and option (the "Reload
Option") to purchase all or any portion of that number of shares of Common Stock
equal to the number of shares of Common Stock so delivered upon exercise of the
Option.  Each Reload Option shall (i) have a per Share Exercise Price equal to
the fair market value of the Common Stock on the date of exercise of the Option
to which such Reload Option relates, determined pursuant to Section 4(c) of this
Option Agreement; (ii) have a term no longer than the remaining term of the
Option at the time of exercise; (iii) become exercisable in full from and after
that date which is six months following its date of grant; and (iv) otherwise
have terms and conditions identical to the Option.  The Company shall promptly
following the grant of a Reload Option prepare and deliver to Employee a written
option agreement memorializing the grant of such Reload Option; but the failure
to prepare and deliver such documentation shall not affect the continuing
validity and enforceability of such Reload Option.

     5.   TERMINATION OF EMPLOYMENT.

          (a)  If Employee shall cease to be an employee of the Company, or any
direct or indirect subsidiary of the Company, (other than as the result of the
transfer of employment of Employee to another corporation which is the Company,
or any direct or indirect subsidiary of the Company) for any reason other than
retirement, death or permanent disability (a "TERMINATING EVENT"), Employee
shall have the right, subject to the provisions of

<PAGE>

Section 5(b) below, to exercise the Option at any time following such
Terminating Event until the earliest to occur of (x) 90 days following the date
of such Terminating Event and (y) the expiration of the term of this Option as
set forth in Section 2 of this Option Agreement.  The Option may be exercised
following a Terminating Event only to the extent exercisable as of the date of
the Terminating Event.  To the extent unexercised at the end of the period
referred to above, the Option shall terminate.  The Committee, in its sole and
absolute discretion, shall determine whether authorized leaves of absence shall
constitute termination of employment for purposes of this Option Agreement.

          (b)  Notwithstanding the provisions of Section 5(a) above, if the
Company believes that an Employee has committed an act of misconduct as
described below, the Company may suspend the Employee's rights under the Option
pending a determination by the Board of Directors of the Company.  If the Board
of Directors determines that an Employee has committed an act of embezzlement,
fraud, nonpayment of any obligation owed to the Company or any subsidiary,
breach of fiduciary duty or deliberate disregard of the Company's rules
resulting in loss, damage or injury to the Company, or if an Employee makes an
unauthorized disclosure of trade secret or confidential information of the
Company, engages in any conduct constituting unfair competition, or induces any
customer of the Company to breach a contract with the Company, neither the
Employee nor his or her estate shall be entitled to exercise any rights
whatsoever with respect to the Option. In making such determination, the Board
of Directors shall act fairly and shall give the Employee a reasonable
opportunity to appear and present evidence on his or her behalf at a hearing
before a committee of the Board of Directors; and if the Employee is an
"officer" under Rule 16a-1(f) of the Rules and Regulations of the Securities and
Exchange Commission under the Securities Exchange Act of 1934, as amended, the
determination of the Board of Directors shall be subject to the approval of the
Committee.

          (c)  If, by reason of retirement, death or disability (a "SPECIAL
TERMINATING EVENT"), Employee shall cease to be an employee the Company or any
direct or indirect subsidiary of the Company (other than as the result of the
transfer of employment of Employee to another corporation which is the Company,
or any direct or indirect subsidiary of the Company), then Employee, Employee's
executors or administrators or any person or persons acquiring the Option
directly from Employee by bequest or inheritance, shall have the right to
exercise the Option (i) in the event of Employee's disability, within twelve
months following the date of such Special Terminating Event, or (ii) in the
event of Employee's retirement, or in the event of Employee's death, within
eighteen months of either Special Terminating Event.  The Option may be
exercised following a Special Terminating Event only to the extent exercisable
at the date of the Special Terminating Event.  To the extent unexercised at the
end of the period referred to above, the Option shall terminate.

          (d)  For purposes of this Option Agreement, "disability" shall mean
total and permanent disability as defined in Section 22(e)(3) of the Internal
Revenue Code of 1986, as amended (the "Code").  Employee shall not be considered
permanently disabled unless he

<PAGE>

furnishes proof of such disability in such form and manner, and at such times,
as the Committee may from time to time require.

     6.   ADJUSTMENTS UPON RECAPITALIZATION.

          In the event of any change in the outstanding shares of the Common
Stock or other securities then subject to this option by reason of any stock
split, reverse stock split, stock dividend, recapitalization, merger,
consolidation, combination or exchange of shares or other similar corporate
change, or if the outstanding securities of the class then subject to this
Agreement are exchanged for or converted into cash, property or a different kind
of securities, or if cash, property or securities are distributed in respect of
such outstanding securities (other than a regular cash divided) then, unless the
terms of such transaction shall otherwise provide, such equitable adjustments
shall be made by the Board, or the Committee, in the Option (including, without
limitation, appropriate and proportionate adjustments to the number and type of
shares or other securities or cash or other property that may be acquired
pursuant to exercise of the Option); and any such adjustments made by the Board
or the Committee shall be final, binding and conclusive for any and all
purposes.

     7.   WAIVER OF RIGHTS TO PURCHASE STOCK.

          By signing this Option Agreement, Employee acknowledges and agrees
that neither the Company nor any other person or entity is under any obligation
to sell or transfer to Employee any option or equity security of the Company,
other than the shares of Common Stock subject to the Option and any other right
or option to purchase Common Stock which was previously granted in writing to
Employee by the Committee (or the Board).  By signing this Option Agreement,
Employee specifically waives all rights which he or she may have had prior to
the date of this Option Agreement (other than any other right or option to
purchase Common Stock which was previously granted in writing to Employee by the
Committee or the Board) to receive any option or equity security of the Company.

     8.   NO RIGHTS AS SHAREHOLDER.

          Except as provided in Section 6 of this Option Agreement, Employee
shall have no rights as a shareholder with respect to the Shares until the date
of the issuance to Employee of a stock certificate or stock certificates
evidencing such Shares.  Except as may be provided in Section 6 of this Option
Agreement, no adjustment shall be made for dividends (ordinary or extraordinary,
whether in cash, securities or other property) or distributions or other rights
for which the record date is prior to the date such stock certificate is issued.

     9.   MODIFICATION.

          The Committee (or the Board) may modify, extend or renew the Option or
accept the surrender of, and authorize the grant of a new option in substitution
for, the Option

<PAGE>

(to the extent not previously exercised); PROVIDED, that a modification of the
Option shall be effective only with the consent of the Optionee.

     10.  WITHHOLDING.

          The Company shall be entitled to require as a condition of delivery of
any Purchased Shares upon exercise of any Option that the Optionee agree to
remit, at the time of such delivery or at such later date as the Company may
determine, an amount sufficient to satisfy all federal, state and local
withholding tax requirements relating thereto, and Optionee agrees to take such
other action required by the Company to satisfy such withholding requirements.

     11.  SERVICES OF OPTION HOLDER.

          In consideration for the grant of the Option, Employee agrees to
remain in the employ of, and shall continue to render services to, the Company
or any direct or indirect subsidiary of the Company, as the Committee may from
time to time direct, for a period of one year from the date of this Option
Agreement.  This provision shall not obligate the Company, or such subsidiary,
to continue to employ, or utilize the services of, Employee for any period
whatsoever.  The sole remedy to the Company should Employee breach his or her
obligations under this Section 11 shall be to cancel this Option Agreement and
the Option granted under this Option Agreement.  For the purposes of this Option
Agreement, the term "subsidiary" shall mean any present or future corporation
which would be a "subsidiary corporation" of the Company, as defined in Section
424 of the Code.

     12.  CHARACTER OF OPTION.

          The Option is not intended to qualify as an "incentive stock option"
as that term is defined in Section 422 of the Code.

     13.  GENERAL PROVISIONS.

          (a)  FURTHER ASSURANCES.  Employee shall promptly take all actions and
execute all documents requested by the Company which the Company deems to be
reasonably necessary to effectuate the terms and intent of this Option
Agreement.

          (b)  NOTICES.  All notices, requests, demands and other communications
under this Option Agreement shall be in writing and shall be given to the
parties hereto as follows:

                    14.  If to the Company, to:
                         3D Systems Corporation
                         26081 Avenue Hall
                         Valencia, CA  91355

<PAGE>

                         Attention:  General Counsel

                    15.  If to Employee, to the address set
                         forth in the records of the Company,

or at such other address or addresses as may have been furnished by such either
party in writing to the other party hereto.  Any such notice, request, demand or
other communication shall be effective (i) if given by mail, 72 hours after such
communication is deposited in the mail by first-class certified mail, return
receipt requested, postage prepaid, addressed as aforesaid; or (ii) if given by
any other means, when delivered at the address specified in this
subparagraph (b).

          (c)  TRANSFER OF RIGHTS UNDER THIS OPTION AGREEMENT.  The Company may
at any time transfer and assign its rights and delegate its obligations under
this Option Agreement to any other person, corporation, firm or entity,
including its officers, directors and stockholders, with or without
consideration.

          (d)  OPTION NON-TRANSFERABLE.  Employee may not sell, transfer, assign
or otherwise dispose of the Option except by will or the laws of descent and
distribution, and Options may be exercised during the lifetime of Employee only
by Employee or by his or her guardian or legal representative.

          (e)  MARKET STAND-OFF.  In the event of an underwritten public
offering by the Company of its equity securities pursuant to an effective
registration statement filed under the Securities Act of 1933, as amended,
Employee shall not sell, make any short sale of, loan, hypothecate, pledge,
grant any option for the repurchase of, or otherwise dispose or transfer for
value, or otherwise agree to engage in any of the foregoing transactions with
respect to any shares of Common Stock without the prior written consent of the
Company or its underwriters, for such period of time from and after the
effective date of such registration statement as may be requested by the Company
or such underwriters (the "MARKET STAND-OFF"); provided, however, that in no
event shall such period exceed 180 days.

          (f)  SUCCESSORS AND ASSIGNS.  Except to the extent specifically
limited by the terms and provisions of this Option Agreement, this Option
Agreement shall be binding upon and inure to the benefit of the parties hereto
and their respective successors, assigns, heirs and personal representatives.

          (g)  GOVERNING LAW.  THIS OPTION AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA APPLICABLE TO
CONTRACTS MADE IN, AND TO BE PERFORMED SOLELY WITHIN, THAT STATE.

<PAGE>

          (h)  MISCELLANEOUS.  Titles and captions contained in this Option
Agreement are inserted for convenience of reference only and do not constitute a
part of this Option Agreement for any other purpose.

          The Signature Page to this Option Agreement consists of the last page
of the Certificate.

<PAGE>

                                     Exhibit "A"

                                 NOTICE OF EXERCISE

                  (To be signed only upon exercise of the Option)

TO:  3D Systems Corporation

     The undersigned, the holder of the enclosed Stock Option Agreement
(Non-Statutory Stock Option), hereby irrevocably elects to exercise the purchase
rights represented by the Option and to purchase thereunder ______* shares of
Common Stock of 3D Systems Corporation (the "COMPANY"), and herewith encloses
payment of $__________ and/or _________ shares of the Company's Common Stock in
full payment of the purchase price of such shares being purchased.

Dated:__________________________

                                  ____________________________________
                                  (Signature must conform in all respects to
                                  name of holder as specified on the face of the
                                  Option)

                                  ____________________________________
                                  (Please Print Name)

                                  ____________________________________
                                  (Address)

     * Insert here the number of shares called for on the face of the Option
(or, in the case of a partial exercise, the number of shares being
exercised), in either case without making any adjustment for additional
Common Stock of the Company, other securities or property which, pursuant to
the adjustment provisions of the Option, may be deliverable upon exercise.

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