Planning Information Systems and Services. Economics of Information (A.J. Repo). Basic Techniques and Technologies. Artificial Intelligence and Information Retrieval (L.C. Smith). Natural Language Processing (A.J. Warner). Retrieval Techniques (N.J. Belkin, W.B. Croft). Statistical Methods in Information Science Research (M.T. Kinnucan, M.J. Nelson, B.L. Allen). Electronic Image Information (L.F. Lunin). Applications. End-User Searching of Bibliographic Databases (W.H. Mischo, J. Lee). Systems that Inform: Emerging Trends in Library Automation and Network Development (W. Shaw, P.B. Culkin). Agricultural Information Systems and Services (R.C. Frank). Index (to this volume). Keyword and Author Index to ARIST volumes 1-22.