A NEW CIRCULATION SYSTEM NOW IN USE AT THE ELECTRONICS SYSTEMS CENTER (ESC) LIBRARY, PART OF INTERNATIONAL BUSINESS MACHINES CORPORATION, IS BASED UPON A PREVIOUS SYSTEM WHICH USED TABULATING CARDS, UNIT RECORD MACHINES, AND A SMALL COMPUTER. THE NEW SYSTEM IS A TRANSACTION CARD SYSTEM, IN WHICH ONE BASIC TYPE OF CARD FORMAT IS USED FOR CHARGING, DISCHARGING, AND OTHER TRANSACTIONS IN THE SYSTEM. NEW BOOK CARDS WERE PRODUCED BY DUPLICATING THE ORIGINAL SHELFLIST, WHICH WAS ALREADY IN MACHINE-READABLE FORMAT, FOR THE 11,000 TO 13,000 VOLUMES IN THE LIBRARY. AS A BOOK IS LOANED, THE REST OF THE CARD IS FILLED OUT WITH INFORMATION ABOUT THE BORROWER AND THE CARD IS USED TO PRODUCE A NEW BOOK CARD AND THE TRANSACTION CARD FOR THE LOAN. WHEN A BOOK IS RETURNED OR A CHANGE IN ITS LOAN STATUS IS NOTED, THIS IS ALSO RECORDED ON A TRANSACTION CARD. ALL OF THE TRANSACTION CARDS ARE CODED FOR THE APPROPRIATE ACTION BY THE COMPUTER, WHICH MANIPULATES THE INFORMATION TO DISCHARGE THE BOOKS, RECORD LOANS, AND WRITE OVERDUE NOTICES AT THE APPROPRIATE INTERVALS. OTHER OUTPUTS PRODUCED ARE--(1) A LIST OF BOOKS BORROWED ARRANGED BY BORROWER WITH A STATISTICAL SUMMARY OF THE WEEK'S ACTIVITY, (2) SHELFLIST OF THE LIBRARY BOOK COLLECTION TELLING WHERE EACH BOOK IS AND HOW OFTEN IT HAS CIRCULATED, AND (3) OTHER STATISTICAL REPORTS, SUCH AS LISTS OF BOOKS LOST. THE ONLY BOOK RELATED CIRCULATION ACTIVITIES NOT HANDLED BY THE SYSTEM ARE RESERVES AND INTERLIBRARY LOANS. THIS DOCUMENT IS ALSO AVAILABLE AS IBM-67-825-2201 IN SINGLE COPIES ON REQUEST FROM THE TECHNICAL REPORTS CENTER, INTERNATIONAL BUSINESS MACHINES CORPORATION, OWEGO, NEW YORK 13827. (CM)