Defines the interactive timeout interval (ITI) as the amount of time that is allowed to lapse between user entries before the computer assumes that the terminal is abandoned and stops polling it. A method for determining optimal ITI, thereby increasing system efficiency of online catalogs, is demonstrated. (10 references) (CLB)

Details the characteristics of authority records in the machine readable Library of Congress Subject Headings. Statistics are given on occurrences of variable length fields and the length and maximum length of such fields in subject heading records. The usefulness of these statistics for system design is discussed. (five references) (CLB)

A series of articles examines the possible role of standards in measuring the performance of automated library systems and in planning the needed capacity of a system. Topics discussed include capacity modeling; response time measurement; system performance from the library, vendor, and consultant perspectives; and development of performance…