Etymology
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jargon (n.)
mid-14c., "unintelligible talk, gibberish; chattering, jabbering," from Old French jargon "a chattering" (of birds), also "language, speech," especially "idle talk; thieves' Latin" (12c.). Ultimately of echoic origin (compare Latin garrire "to chatter").

From 1640s as "mixed speech, pigin;" 1650s as "phraseology peculiar to a sect or profession," hence "mode of speech full of unfamiliar terms." Middle English also had it as a verb, jargounen "to chatter" (late 14c.), from French.
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jar (v.)
1520s, "to make a brief, harsh, grating sound," often in reference to bird screeches; the word often is said to be echoic or imitative; compare jargon (n.), jay (n.), garrulous. Figurative sense of "have an unpleasant effect on" is from 1530s; that of "cause to vibrate or shake" is from 1560s. Related: Jarred; jarring. As a noun in this sense from 1540s.
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mum (n.1)

abbreviation of chrysanthemum, by 1915 in the jargon of gardeners.

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educationese (n.)
"the jargon of school administrators," 1966, from education + -ese.
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go (adj.)
"in order," 1951, originally in aerospace jargon, from go (v.).
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bitmap (n.)
1973, in computer jargon, from bit (n.2) + map. Literally, a map of bits.
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CD-ROM 
1983, in computer jargon; also cd-rom; from compact disc read-only memory.
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essentialism (n.)
1939, in educational jargon (opposed to progressivism), from essential + -ism. Related: Essentialist.
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authoritarianism (n.)
1883; see authoritarian + -ism. Early use mostly in communist jargon.
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APB 
also a.p.b., "general alarm," 1960, police jargon initialism (acronym) for all-points bulletin, itself attested by 1953 (perhaps more in the jargon of detective novels than in actual police use). The notion is "information of general importance," broadcast to all who can hear it.
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