EXHIBIT 16.1 May 24, 2002 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Dear Sir/Madam: We have read the first, second, third, and fourth paragraphs of Item 4 included in the Form 8-K dated May 24, 2002 of Wallace Computer Services, Inc. to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ Arthur Andersen LLP cc: Ms. Vicki L. Avril, Wallace Computer Services, Inc.