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Debugging is the process of finding and resolving bugs or defects that prevent correct operation of computer software or a system. Debugging tends to be harder when various subsystems are tightly coupled, as changes in one may cause bugs to emerge in another. Numerous books have been written about debugging (see below: Further reading), as it involves numerous aspects, including interactive debugging, control flow, integration testing, log files, monitoring (application, system), memory dumps, profiling, Statistical Process Control, and special design tactics to improve detection while simplifying changes. ==Origin== The terms "bug" and "debugging" are popularly attributed to Admiral Grace Hopper in the 1940s.〔(Grace Hopper ) from FOLDOC〕 While she was working on a Mark II Computer at Harvard University, her associates discovered a moth stuck in a relay and thereby impeding operation, whereupon she remarked that they were "debugging" the system. However the term "bug" in the meaning of technical error dates back at least to 1878 and Thomas Edison (see software bug for a full discussion), and "debugging" seems to have been used as a term in aeronautics before entering the world of computers. Indeed, in an interview Grace Hopper remarked that she was not coining the term. The moth fit the already existing terminology, so it was saved. A letter from J. Robert Oppenheimer (director of the WWII atomic bomb "Manhattan" project at Los Alamos, NM) used the term in a letter to Dr. Ernest Lawrence at UC Berkeley, dated October 27, 1944,〔http://bancroft.berkeley.edu/Exhibits/physics/images/bigscience25.jpg〕 regarding the recruitment of additional technical staff. The Oxford English Dictionary entry for "debug" quotes the term "debugging" used in reference to airplane engine testing in a 1945 article in the Journal of the Royal Aeronautical Society. An article in "Airforce" (June 1945 p. 50) also refers to debugging, this time of aircraft cameras. Hopper's bug was found on September 9, 1947. The term was not adopted by computer programmers until the early 1950s. The seminal article by Gill〔S. Gill, (The Diagnosis of Mistakes in Programmes on the EDSAC ), Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol. 206, No. 1087 (May 22, 1951), pp. 538-554〕 in 1951 is the earliest in-depth discussion of programming errors, but it does not use the term "bug" or "debugging". In the ACM's digital library, the term "debugging" is first used in three papers from 1952 ACM National Meetings.〔Robert V. D. Campbell, (Evolution of automatic computation ), Proceedings of the 1952 ACM national meeting (Pittsburgh), p 29-32, 1952.〕〔Alex Orden, (Solution of systems of linear inequalities on a digital computer ), Proceedings of the 1952 ACM national meeting (Pittsburgh), p. 91-95, 1952.〕〔Howard B. Demuth, John B. Jackson, Edmund Klein, N. Metropolis, Walter Orvedahl, James H. Richardson, (MANIAC ), Proceedings of the 1952 ACM national meeting (Toronto), p. 13-16〕 Two of the three use the term in quotation marks. By 1963 "debugging" was a common enough term to be mentioned in passing without explanation on page 1 of the CTSS manual.〔(The Compatible Time-Sharing System ), M.I.T. Press, 1963〕 Kidwell's article ''Stalking the Elusive Computer Bug''〔Peggy Aldrich Kidwell, (Stalking the Elusive Computer Bug ), IEEE Annals of the History of Computing, 1998.〕 discusses the etymology of "bug" and "debug" in greater detail. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「debugging」の詳細全文を読む スポンサード リンク
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