During 1968 the name of the project was changed from Stanford Physics Information Retrieval System" to "Stanford Public Information Retrieval System" to reflect the broadening of perspective and goals due to formal collaboration with Project BALLOTS (Bibliographic Automation of Large Library Operations using a Time-Sharing System). The primary facility under development is still the computer information system for on-line reference retrieval. The file language techniques used are essentially as described in the 1967 report. The computer programming done in the demonstration version of SPIRES was judged to be suitable as the nucleus for Stanford Library Automation Project, and is to be used to provide more efficient internal processing of bibliographic information in the library. The major technical progress during 1968 was the completion of the SPIRES Supervisor, a special-purpose time-sharing system that serves multiple typewriter terminals. The designer, William Riddle, describes the specifications for the Supervisor in Appendix I of this report. Also appended is the SPIRES reference manual, a guide to user procedures prepared by Richard Bielsker. (Author/JW)