Use of tree structures for processing files
Communications of the ACM
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The University of Denver has had a punched-card accounting system for many years. It has grown from an IBM 402 through a 407 to a 1401 with very little change in the system. Meanwhile, on the other side of the campus a modern Computing Center has been developed, with a Burroughs B5500 including time-sharing facilities and a large disk file. During this period, the University enrollment and annual budget have grown, and the card-oriented system can no longer provide the timely information and the variety of reports and summaries needed. In the spring of 1967 it was decided to begin conversion of all of the University financial systems to the B5500. This course was chosen instead of expanding the 1401 system because of the high cost of duplication of such sophisticated equipment and because it was estimated that it would not cause a significant increase in work load on the B5500.