The Evolution of Storage Structures Data base management systems have grown rapidly in their power and complexity over the 15-year history of data processing on commercially available computers. The original concepts have split, and new terms have been adopted to name and refer to these concepts. The Data Structure Diagram graphic technique is used to illustrate the splitting of the concepts and the structural relations which exist between these concepts at each point in the evolution. CACM July, 1972 Bachman, C. W. block, cylinder, device, field, extent file, page, record, physical record, logical record, track, volume, entity, set, entity class, set class, data structure diagram, storage structure, physical storage structure, logical storage structure, storage allocation structure, Integrated Data Store, index sequential, hash, randomize, item 1.4 4.41 4.9 CA720715 JB January 30, 1978 1:16 PM 2258 4 2313 2319 4 2313 2313 4 2313 2359 4 2313 2437 4 2313 2552 4 2313 2781 4 2313 2860 4 2313 2991 4 2313 2203 5 2313 2313 5 2313 2313 5 2313 2313 5 2313 2425 5 2313 2313 6 2313