OK

[6] The etymology that most reference works provide today is based on a survey of the word's early history in print: a series of six articles by Allen Walker Read[7] in the journal American Speech in 1963 and 1964.

Read argues that, at the time of the expression's first appearance in print, a broader fad existed in the United States of "comical misspellings" and of forming and employing acronyms, themselves based on colloquial speech patterns: The abbreviation fad began in Boston in the summer of 1838 ... and used expressions like OFM, "our first men," NG, "no go," GT, "gone to Texas," and SP, "small potatoes."

[11] In response, Whig opponents attributed OK, in the sense of "Oll Korrect", to the bad spelling of Andrew Jackson, Van Buren's predecessor.

The country-wide publicity surrounding the election appears to have been a critical event in OK's history, widely and suddenly popularizing it across the United States.

"[11]In "All Mixed Up", the folk singer Pete Seeger sang that OK was of Choctaw origin,[14] as the dictionaries of the time tended to agree.

Three major American reference works (Webster's, New Century, Funk & Wagnalls) cited this etymology as the probable origin until as late as 1961.

[14] The earliest written evidence for the Choctaw origin is provided in work by the Christian missionaries Cyrus Byington and Alfred Wright in 1825.

The presumption was that the use of particle "oke" or "hoke" was so common and self-evident as to preclude any need for explanation or discussion for either its Choctaw or non-Choctaw readership.

[21][22] For the three decades prior to the Boston abbreviation fad, the Choctaw had been in extensive negotiation with the U.S. government,[23] after having fought alongside them at the Battle of New Orleans.

An early attestation of the particle 'kay' is found in a 1784 transcription of a North Carolina slave, who, seeking to avoid being flogged, explained being found asleep in the canoe he had been ordered to bring to a certain place to pick up a European exploring near his newly-purchased property : Kay, massa, you just leave me, me sit here, great fish jump up into da canoe, here he be, massa, fine fish, massa; me den very grad; den me sit very still, until another great fish jump into de canoe; but me fall asleep...[24]A West African (Mande and/or Bantu) etymology has been argued in scholarly sources, tracing the word back to the Wolof and Bantu[clarification needed] word waw-kay or the Mande (aka "Mandinke" or "Mandingo") phrase o ke.

[citation needed] David Dalby first made the claim that the particle OK could have African origins in the 1969 Hans Wolff Memorial Lecture.

[4][26] Frederic Cassidy challenged Dalby's claims, asserting that there is no documentary evidence that any of these African-language words had any causal link with its use in the American press.

[25] The West African hypothesis had not been accepted by 1981 by any etymologists,[25][27][28] yet has since appeared in scholarly sources published by linguists and non-linguists alike.

Charles Gordon Greene wrote about the event using the line that is widely regarded as the first instance of this strain of OK, complete with gloss: The above is from the Providence Journal, the editor of which is a little too quick on the trigger, on this occasion.

The "Chairman of the Committee on Charity Lecture Bells," is one of the deputation, and perhaps if he should return to Boston, via Providence, he of the Journal, and his train-band, would have his "contribution box," et ceteras, o.k.—all correct—and cause the corks to fly, like sparks, upward.Read gives a number of subsequent appearances in print.

[32] The lawyer who successfully argued many Indian rights claims, Felix S. Cohen, supported the Jacksonian popularization of the term based on its Choctaw origin: When Andrew Jackson popularized a word that his Choctaw neighbors always used in their councils to signify agreement, the aristocrats he threw out of office, always grasping at a chance to ridicule backwoods illiteracy, accused him of abbreviating and misspelling "All Correct".

Mencken (following Read) described the diary entry as a misreading of the author's self-correction, and stated it was in reality the first two letters of the words a h[andsome] before noticing the phrase had been used in the previous line and changing his mind.

[36] Another example given by Dalby is a Jamaican planter's diary of 1816, which records a black slave saying "Oh ki, massa, doctor no need be fright, we no want to hurt him".

The gesture was popularized in the United States in 1840 as a symbol to support then-presidential candidate and incumbent vice president Martin Van Buren.

[80] In the Hypertext Transfer Protocol (HTTP), upon which the World Wide Web is based, a successful response from the server is defined as OK (with the numerical code 200 as specified in RFC 2616).

Okay sign
Example of OK and Cancel buttons in Windows Notepad
A blue screen with white text: "MSX BASIC version 3.0 / Copyright 1988 by Microsoft / 23414 Bytes free / Disk BASIC version 1.0 / Ok" and a square representing the cursor. On the bottom line, "color auto goto list run".
The command prompt for user input in MSX BASIC was Ok