In 1967, the New York State Library at Albany (NYSL) developed a tape-oriented, off-line serials control system for 10,000 active titles. The system would perform all the serials control functions: bibliographic control, check-in of current receipts, claiming for gaps in receipts and late issues, binding notification for completed sets, subscription renewal, payment control of invoices, and the reporting of statistical data. After two years of operation, the GE 235 computer was converted to a CDC 3300. The NYSL system requires 85 data elements and is primarily a control record with some bibliographic data. Data base creation was the most time-consuming task, as it involved gathering data from diverse files and generating control data for claiming and binding. The experience of NYSL has shown the effectiveness of a KWIC Index for multiple access to the file and practical use of Computer Output on Microfilm. Samples of conversion forms, system outputs, flow charts, a list of data elements, and record layouts are contained in appendixes. (Author/KC)