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RTFM is an initialism for the expression "read the fucking manual" or, in the context of the Unix computer operating system, "read the fucking man page". The RTFM comment is usually expressed when the speaker is irritated by another person's question or lack of knowledge. It refers to either that person's inability to read a technical manual, or to their perceived laziness in not doing so first, before asking the question. In expurgated texts, substitutions such as "read the flaming manual", "read the fine manual" or "read the friendly manual" are used〔Howard, Michael, David LeBlanc, and John Viega. ''19 Deadly Sins of Software Security: Programming Flaws and How to Fix Them''. New York: McGraw-Hill/Osborne, 2005. ISBN 0-07-226085-8.〕 (or similar variants). Initialisms similar to RTFM include "STFW" ("search the fucking web"), "GIYF" ("Google is your friend") and "LMGTFY" ("let me Google that for you"). These indicate that the questioner could have easily found the answer to their question on the World Wide Web. Many alternative expansions for "RTFM" exist, as do many similarly-themed alternative initialisms. ==Possible origins== The initialism appeared in print in 1979 on the table of contents page of the ''LINPACK User's Guide''〔Dongarra, J. J., C. B. Moler, J. R. Bunch, and G. W. Stewart. ''LINPACK User's Guide''. Philadelphia: SIAM, 1979. ISBN 0-89871-172-X.〕 in the form ''R.T.F.M." -- Anonymous'', suggesting that it was already well established. Cleve Moler has since revealed that a visit to Argonne National Laboratory by Tektronix software manager Ned Thanhouser (grandson of Edwin Thanhouser) during the development of MATLAB led to the anonymous quote. John Bears 1983 book ''Computer Wimp! 166 Things I Wish I Had Known Before I Bought My First Computer!'' discusses the author hearing employees of a computer store mention RYFM ("read your fucking manual"). The phrase RTFM was in common use in the early 1950s by radio and radar technicians in the US armed forces. Operators frequently did not check for simple faults before asking questions; for example, checking whether a power switch was on, a fuse had blown or a power cord had become disconnected. A common response would be, "Did you check the oh en oh ef ef switch (On/Off)." 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「RTFM」の詳細全文を読む スポンサード リンク
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