Project Intrex, Semiannual Activity Report, 15 September 1970 - 15 March 1971.

The research activities of Project Intrex are directed toward the extension of man's intellectual reach by a new kind of control over access to information. Ways are sought to improve the efficiency of catalog search by utilization of interactive computing techniques, and to provide rapid access to full-text displays by utilizing microfilm storage and facsimile transmission. User experiments, the central subject of the report, show a great deal of work needs to be done, but are mainly encouraging. The principal remedy for existing budgetary constrainsts which have called for drastic retrenchment will be found in the organizational domain. If the purposes of special interest groups can be met at an acceptable cost, utilization of these techniques can spread through interlibrary cooperation and networking to gradually form a multidisciplinary library network. (AB)