The Ohio State University Libraries On-line Remote Catalog Access and Circulation Control System (LCS) began on-line operations with the conversion of one department library in November 1970. By December all 26 libraries had been converted to the automated system and LCS was fully operational one month ahead of schedule. LCS is designed as a user-oriented system. It utilizes the capabilities of high-speed computers, random access mass storage devices, telecommunication networks, and on-line terminals to provide both traditional circulation services and a unique access to the system by telephone. Part I, "Functional Specification" states explicitly the objectives of the system, the function which it performs, the details of all its interfaces, and the format of its files and tables, and represents the specifications for the computer system. Part II, "User's Guide" is a manual designed for the librarians who actually operate LCS provides detailed instructions for use of LCS terminals. (Author/AB)