SCHEDULE 14A
(RULE 14A-101)

INFORMATION REQUIRED IN PROXY STATEMENT
SCHEDULE 14A INFORMATION

PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES
EXCHANGE ACT OF 1934 (AMENDMENT NO. )

Filed by the registrant [ ]

Filed by a party other than the registrant [ ]

Check the appropriate box:

[ ] Preliminary proxy statement. [ ] Confidential, for use of the
Commission only (as permitted by
Rule 14a-6(e)(2).

[ ] Definitive proxy statement.

[X] Definitive additional materials.

[ ] Soliciting material pursuant to Rule 14a-11(c) or Rule 14a-12.

CASINO DATA SYSTEMS, INC.
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(Name of Registrant as Specified in Its Charter)

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(Name of Person(s) Filing Proxy Statement if Other Than the Registrant)

Payment of filing fee (check the appropriate box):

[X] No fee required.

[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and
0-11.

(1) Title of each class of securities to which transaction applies:

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(2) Aggregate number of securities to which transaction applies:

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(3) Per unit price or other underlying value of transaction computed
pursuant to Exchange Act Rule 0-11 (set forth the amount on which the
filing fee is calculated and state how it was determined):

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(4) Proposed maximum aggregate value of transaction:

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(5) Total fee paid:

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[ ] Fee paid previously with preliminary materials.
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[ ] Check box if any part of the fee is offset as provided by Exchange Act
Rule 0-11(a)(2) and identify the filing for which the offsetting fee
was paid previously. Identify the previous filing by registration
statement number, or the form or schedule and the date of its filing.

(1) Amount Previously Paid:

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(2) Form, Schedule or Registration Statement No.:

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(3) Filing Party:

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(4) Date Filed:

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[CASINO DATA SYSTEMS LOGO]

3300 Birtcher Drive
Las Vegas, Nevada 89118

SUPPLEMENT TO PROXY STATEMENT
FOR
ANNUAL MEETING OF STOCKHOLDERS TO BE HELD
JUNE 6, 2000*

This document (the "Supplement") is intended to supplement the Proxy
statement (the "Proxy Statement") previously furnished by Casino Data Systems
(the "Company") for use at the Annual Meeting of Stockholders of the Company.
THE DATE FOR THE ANNUAL MEETING HAS BEEN CHANGED FROM MAY 25, 2000 TO JUNE 6,
2000; THE MEETING WILL BE HELD AT 11:00 A.M. LOCAL TIME ON JUNE 6, 2000 AT THE
OFFICES OF THE COMPANY LOCATED AT 3300 BIRTCHER DRIVE, LAS VEGAS, NEVADA 89118.

THIS SUPPLEMENT SHOULD BE READ IN CONJUNCTION WITH BOTH THE PROXY STATEMENT
AND THE COMPANY'S ANNUAL REPORT TO STOCKHOLDERS WHICH WERE MAILED TO
STOCKHOLDERS ON OR ABOUT APRIL 25, 2000.

On May 1, 2000, the Board of Directors of the Company increased the number
of directors serving on the Board from five to six and appointed Michael D.
Rumbolz to occupy the additional position. In accordance with the Company's
Bylaws, Mr. Rumbolz has been appointed to serve in the class of directors whose
term expires at the 2000 Annual Meeting of Stockholders. Accordingly, management
proposes that Mr. Rumbolz be re-elected to the Board of Directors at the Annual
Meeting to be held on June 6, 2000. This Supplement is intended to provide the
Company's stockholders with information relevant to the proposed re-election of
Mr. Rumbolz to the Board of Directors.

Michael D. Rumbolz is currently Chairman of the Board of Directors of
Employers Insurance Company of Nevada ("EICON"), a position he has held since
January 2000. EICON is a mutual insurance company with over $2 Billion in assets
and provides workers compensation insurance coverage to Nevada employers. From
1995 to early 2000, Mr. Rumbolz held the positions of President and Chief
Executive Officer of Anchor Gaming, a diversified gaming company.

Prior to joining Anchor, Mr. Rumbolz was Director of Corporate Development
for Circus Circus Enterprises, Inc. In December 1993, Mr. Rumbolz was asked to
take a leave of absence from Circus Circus to become the first President and
Managing Director of Windsor Casino Limited, a consortium company owned by
Hilton Hotel Corporation, Circus Circus Enterprises, Inc. and Caesars World.

Mr. Rumbolz was appointed Chief Deputy Attorney General for Nevada in 1983.
In 1985, he was appointed by the governor of Nevada to the Nevada State Gaming
Control Board as the member in charge of Enforcement and Special Investigations
Divisions. He then served as Chairman of the Nevada Gaming Control Board and
Executive Director for the agency from June 1987 through December of 1988.

THE BOARD OF DIRECTORS RECOMMENDS THAT STOCKHOLDERS VOTE FOR OF THE
REELECTION OF MR. RUMBOLZ TO THE BOARD OF DIRECTORS.
3

Enclosed with this Supplement is a revised proxy card (a BLUE card) which
identifies Mr. Rumbolz as a nominee for re-election to the Company's Board of
Directors. PLEASE COMPLETE, EXECUTE AND MAIL THE REVISED (BLUE) PROXY CARD IN
THE ENCLOSED ENVELOPE AS SOON AS POSSIBLE, EVEN IF YOU INTEND TO ATTEND THE
ANNUAL MEETING. BY RETURNING THE ENCLOSED REVISED (BLUE) PROXY CARD, YOU WILL
EFFECTIVELY REVOKE ANY PREVIOUSLY SUBMITTED (WHITE) PROXY CARD DELIVERED BY YOU
TO THE COMPANY IN CONNECTION WITH THE ANNUAL MEETING.

By Order of the Board of Directors

CASINO DATA SYSTEMS

/s/ Steven A. Weiss
Chairman of the Board of Directors

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* Please note that the date for the Annual Meeting of Stockholders has been
changed from May 25, 2000 to June 6, 2000.
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[CASINO DATA SYSTEMS (TM) LOGO]

CASINO DATA SYSTEMS
PROXY FOR ANNUAL MEETING OF STOCKHOLDERS - JUNE 6, 2000 PROXY
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The undersigned, a stockholder of Casino Data Systems (the "Company"),
hereby appoints Steven A. Weiss and Bruce W. Benson, and each of them as
proxies, with full power of substitution, to vote on behalf of the undersigned
the number of shares which the undersigned is then entitled to vote, at the
Annual Meeting of the Stockholders of Casino Data Systems to be held at the
corporate offices of the Company located at 3300 Birtcher Drive, Las
Vegas, Nevada, on Tuesday, June 6, 2000 at 11:00 a.m., and any adjournments or
postponements thereof, upon matters set forth below, with all the powers which
the undersigned would possess if personally present:

The undersigned hereby revokes all previous proxies relating to the shares
covered hereby and acknowledges receipt of the Notice and Proxy Statement and
the Supplement to the Proxy Statement relating to the Annual Meeting.

THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS.

It will be voted on the matters set forth on the reverse side of this form as
directed by the stockholder, but if no direction is made in the space provided,
it will be voted FOR the election of all nominees to the Board of Directors.

(Continued, and TO BE DATED AND SIGNED on the reverse side)

\/ Please detach here \/

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| 1. Election of Directors: 01 HOWARD W. YENKE 02 PHIL E. BRYAN [ ] FOR ALL NOMINEES [ ] WITHHOLD AUTHORITY |
03 MICHAEL D. RUMBOLZ (except as marked to vote for all
to the contrary below) nominees listed below
Nominees for directorships with a two-year term.
_________________________
(INSTRUCTION: TO WITHHOLD AUTHORITY TO VOTE FOR ANY INDIVIDUAL NOMINEE
WRITE THAT NOMINEE'S NAME ON THE SPACE PROVIDED TO THE RIGHT.) _________________________

2. Upon such other business as may properly come before the meeting and any
adjournments or postponements thereof.

ADDRESS CHANGE? MARK BOX AND INDICATE CHANGES BELOW: [ ]

Date:__________ , 2000
_________________________

_________________________

(Stockholder must sign exactly as the name appears
at left. When signed as a corporate officer,
executor, administrator, trustee, guardian, etc.,
please give full title as such. Both joint tenants
must sign.)

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