Measurements of Segment Size Distributions of segment sizes measured under routine operating con ditions on a computer system which utilizes variable sized segments (the Burroughs B5500) are discussed. The most striking feature of the measurements is the large number of small segments-about 60 percent of the segments in use contain less than 40 words. Although the results are certainly not installation independent, and although they are particularly influenced by features of the B5500 ALGOL system, they should be relevant to the design of new computer systems, especially with respect to the organization of paging schemes. CACM March, 1970 Batson, A. Ju, S. Wood, D. C. storage allocation, segmentation, segment sizes, page sizes, paging, resource allocation, memory allocation, core utilization 4.32 6.2 6.34 6.9 CA700303 JB February 13, 1978 4:58 PM 1879 4 2095 1884 4 2095 1892 4 2095 1892 4 2095 1901 4 2095 1901 4 2095 1924 4 2095 2085 4 2095 2095 4 2095 2095 4 2095 2095 4 2095 2095 4 2095 2218 4 2095 2218 4 2095 2218 4 2095 2277 4 2095 2277 4 2095 2297 4 2095 2297 4 2095 2319 4 2095 2329 4 2095 2358 4 2095 2365 4 2095 2373 4 2095 2374 4 2095 2380 4 2095 2434 4 2095 2499 4 2095 2498 4 2095 2501 4 2095 2526 4 2095 2582 4 2095 2596 4 2095 2667 4 2095 2668 4 2095 2669 4 2095 2734 4 2095 2828 4 2095 2862 4 2095 2863 4 2095 2863 4 2095 2881 4 2095 2902 4 2095 2911 4 2095 2928 4 2095 2996 4 2095 3000 4 2095 3006 4 2095 3067 4 2095 1728 5 2095 1751 5 2095 1754 5 2095 1879 5 2095 2095 5 2095 2095 5 2095 2095 5 2095 2218 5 2095 2734 5 2095 3000 5 2095 1380 6 2095 1572 6 2095 1728 6 2095 1751 6 2095 1752 6 2095 1810 6 2095 1879 6 2095 1879 6 2095 1879 6 2095 2095 6 2095 2095 6 2095 2095 6 2095 2864 6 2095