1 EXHIBIT 1 LETTER DATED 3/15/99 FROM ARTHUR ANDERSEN LLP March 15, 1999 Mr. Jim Heim Prologic Management Systems, Inc. 2030 East Speedway Boulevard Tucson, Arizona 85719 Dear Mr. Heim: This is to confirm that the client-auditor relationship between Prologic Management Systems, Inc. and Arthur Andersen LLP has ceased. Very truly yours, /s/ Arthur Andersen LLP Copy to: Office of the Chief Accountant SECPS Letter File Securities and Exchange Commission Mail Stop 9-5 450 Fifth Street, N.W. Washington, D.C. 20549