Public access computing in health science libraries began with online computer-assisted instruction. Library-based collections and services have expanded with advances in microcomputing hardware and software. This growth presents problems: copyright, quality, instability in the publishing industry, and uncertainty about collection scope; librarians managing the new services require new skills to support their collections. Many find the cooperative efforts of several organizational units are required. Current trends in technology for the purpose of information management indicate that these services will continue to be a significant focus for libraries.