This document explores the various issues and concerns related to the development of online systems in libraries and, in particular, online catalogs. Following a preface, foreword, and introduction, chapters are devoted to each of the following topics: (l) providing for special interests including the disabled; (2) authority control; (3) subject access; (4) retrospective conversion; (5) resource sharing; (6) standards; and (7) education. The document is intended to help those who are involved in online catalog design, implementation, and use by making them more aware: (1) of the issues; (2) of the current activity related to them; and (3) of the consequences of that activity on the library profession, on the services provided to library users, and on the profession, on the services provided to library users, and on the library as an institution. A list of acronyms and a subject bibliography are included. (THC)