The 16 articles in this theme issue focus on ways in which libraries provide subject access to their collections in a fast-changing technological environment: (1) "Uncovering Information" (Neal K. Kaske and Peter Paulson); (2) "The New York State Library's Evolving Public Access Catalog" (Alexandria Wolff and Jean Hargrave); (3) "Online Access to Subject Information at Rensselaer Polytechnic Institute" (Liz Lane); (4) "From Backwater to Mainstream: Government Publications in the Online Catalog" (Mary Redmond); (5) "Technical Standards: A Common Ground" (Walt Crawford); (6) "Hypermedia-Enhanced Subject Access to Children's Materials" (Florence E. DeHart); (7) "Interactive Authority Control" (Edward O'Neill); (8) "Dewey Into the 90s" (Peter J. Paulson); (9) "Classification and Cataloging Education" (Judith Hopkins); (10) "Classification Online and the Quest for Knowledge" (Richard S. Halsey); (11) "Appropriate User Interfaces for Subject Searching in Bibliographic Retrieval Systems" (Charles R. Hildreth); (12) "Displaying Materials in an Interdisciplinary Online World: New Approaches" (Joseph R. Matthews); (13) "Information--A Changing Resource" (John J. Regazzi); (14) "Future of Subject Searching" (Richard T. Sweeney); (15) "Expert System Interface Software in Microcomputer Workstations" (William H. Mischo); and (16) "New Challenges in Helping Students Uncover Information: The Learning Disabled Student" (Marian Traina Power, Carol Rundlett, and Myra David). Eight of the articles include references. (SD)