![]() ![]() Instead, an impact assessment can be made to determine if changes to remove an anomaly (or discrepancy) would be cost-effective for the system, or perhaps a scheduled new release might render the change(s) unnecessary. The words "anomaly" and "discrepancy" can be used, as being more neutral terms, to avoid the words "error" and "defect" or "bug" where there might be an implication that all so-called errors, defects or bugs must be fixed (at all costs). #Debugging functions and capabilities in system software fullScope Īs software and electronic systems have become generally more complex, the various common debugging techniques have expanded with more methods to detect anomalies, assess impact, and schedule software patches or full updates to a system. Two of the three use the term in quotation marks.īy 1963 "debugging" was a common-enough term to be mentioned in passing without explanation on page 1 of the CTSS manual. In the ACM's digital library, the term "debugging" is first used in three papers from 1952 ACM National Meetings. The seminal article by Gill in 1951 is the earliest in-depth discussion of programming errors, but it does not use the term "bug" or "debugging". Computer programmers did not adopt the term until the early 1950s. Hopper's bug was found on September 9, 1947. An article in "Airforce" (June 1945 p. 50) also refers to debugging, this time of aircraft cameras. 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. Ernest Lawrence at UC Berkeley, dated October 27, 1944, regarding the recruitment of additional technical staff. Robert Oppenheimer (director of the WWII atomic bomb Manhattan Project at Los Alamos, New Mexico) used the term in a letter to Dr. The moth fit the already existing terminology, so it was saved. ![]() In an interview Grace Hopper remarked that she was not coining the term. Similarly, the term "debugging" seems to have been used as a term in aeronautics before entering the world of computers. However, the term "bug", in the sense of "technical error", dates back at least to 1878 and Thomas Edison who describes the "little faults and difficulties" of mechanical engineering as "Bugs". 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. The terms "bug" and "debugging" are popularly attributed to Admiral Grace Hopper in the 1940s. A computer log entry from the Mark II, with a moth taped to the page ![]()
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