For medical students and residency programs alike, the residency application process is time-consuming. This paper examines one program's experience with a computerized system designed by the Association of American Medical Colleges (AAMC) to simplify and standardize the filing and receipt of applications over the Internet. A large-scale pilot test of the Electronic Residency Application Service (ERAS) was implemented in 1995-1996 for applicants to first-year residency positions in OB-GYN. Each student completed the computerized application, which was transmitted, along with other documents, to student-specified programs by the dean's office via the AAMC "electronic post office." ERAS will be extended to family practice residencies in 1997-1998. A major advantage of ERAS to residency programs is that materials were received in a well-organized, complete, and consistent format. Built-in filters allow grouping of applicants according to various criteria. Opening envelopes and filing documents is no longer necessary. Each student completes one application, and faculty write one letter of recommendation per student. Disadvantages of the 1995-1996 system related to the software, which had an inflexible interface and did not allow a spreadsheet view of the database. Personal statements and recommendation letters were often sent as unformatted ASCII text and were difficult to read. Dean's offices reported problems scanning documents such as transcripts and photographs. These problems led to resubmission of materials and receipt of duplicate copies. With the standard application format, ASCII-style personal statements and "generic" recommendation letters caused applicants to lose individuality. Specific recommendations to the AAMC for improving ERAS include providing a spreadsheet view, allowing students and faculty to write personal statements and letters in standard word processing formats, and allowing faculty to send unique letters to specific residency programs.