Developed from presentations given at a 3-day invitational meeting of 31 leading online catalog designers from both public and private sectors in North America, these papers provide information about online catalogs--their present form, their use, and the questions that need to be considered in their future refinement. All of the papers in this volume have been edited from transcripts or orignal texts. In a few cases, papers have been extensively reworked. The document comprises: (1) "Data Structures and Resource Consumption" (John R. Schroeder and Jessie J. Herr); (2) "Search Retrieval Options" (James F. Corey); (3) "User Feedback in the Design Process" (Charles Hildreth); (4) "Screen Layouts and Displays" (Joseph R. Matthews); (5) "Command Languages and Codes" (Michael Monahan); (6) "Online User Prompts and Aids" (Clay Burrows); (7) "Linking of Systems" (Ray DeBuse); (8) "Telecommunications Considerations for Online Catalogs" (Edwin Brownrigg); and (9) "Summary Questions and Discussion" (Brian Aveney). An agenda of the meeting and a list of participants are appended. (THC)