INTERACTIVE COMPUTER SYSTEMS ESTABLISH A DIALOG BETWEEN THE MAN AND THE MACHINE. BY MEANS OF DISPLAYS, THE USER RECEIVES IMMEDIATE FEEDBACK OF THE RESULT OF HIS ACTIONS, AND HE IS ABLE TO MODIFY HIS DECISIONS IN ORDER TO OBTAIN A SYSTEM RESPONSE THAT IS MOST RELEVANT TO HIS NEEDS. BOLD (BIBLIOGRAPHIC ON-LINE DISPLAY) IS AN EXAMPLE OF A HIGHLY AUTOMATED INTERACTIVE DOCUMENT STORAGE AND RETRIEVAL SYSTEM THAT IS IN OPERATION AT SYSTEM DEVELOPMENT CORPORATION. IT ENALBLES THE USER TO BROWSE THROUGH THE DATA BASE BY SUBJECT CATEGORIES OR SEARCH FOR SPECIFIC DOCUMENTS. THIS DOCUMENT IS AVAILABLE AS AD-661-657 FROM THE CLEARINGHOUSE FOR FEDERAL SCIENTIFIC AND TECHNICAL INFORMATION, SPRINGFIELD, VIRGINIA 22151, $3.00 FOR HARD COPY, $0.65 FOR MICROFICHE, 28 PAGES. (AUTHOR)