Exhibit 16 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 May 22, 2002 Dear Sirs/Madam: We have read the paragraphs of Item 4 included in the Form 8-K dated May 22, 2002 of International Lottery & Totalizator Systems, Inc. to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. With respect to paragraph (a)(2) of Item 4, we have no direct knowledge of the Company's process to replace us with new accountants and cannot comment on that information. Very truly yours, /s/ ARTHUR ANDERSEN LLP ARTHUR ANDERSEN LLP cc: Mr. M. Mark Michalko, President, International Lottery & Totalizator Systems, Inc.