As early as 1565, this word appeared in English wills. Some people say that it originated from the American Civil War, and German-speaking Americans say "OK" means "Oberoomma" (Supreme Commander), and the United States had this rank at that time. Some people say that a German journalist wrote "OK" at the end of the article, which means "Ohnekovretur" (no mistake). It is also said that it may come from a businessman named 0ttokaiser, who put a label with his initials on the product after inspecting the qualified product. According to the American dictionary, 1840 US Democratic presidential candidate Martin Van Buren used "OK" as his campaign slogan. Originally, he was born in Aldrich Hawke, new york, and used the first two letters of this place name as the campaign slogan, meaning "successful election". Linguists think this is a strange spelling from the word "Allcorrect".
It is generally believed that "OK" comes from an American journalist. On March 23rd, 1839, a reporter from Boston Morning Post wrote "OK" before the article went to press. Scholars who study the ancient Greek language believe that this reporter received an ancient Greek education. Thousands of years ago, Greek teachers used to write "Oiakala" or "OK" at the end when reviewing excellent students' articles, which meant that everything was fine, similar to the meaning of "OK" in English.
But some people think that "OK" comes from andrew jackson, the seventh president of the United States.
At that time, when President Jackson reviewed the official document, if he thought that there was nothing wrong with the content, he could send it back to various departments for implementation, and he would write "Oll Korrect" on the official document, indicating that it was completely correct and feasible. After a while, after his subordinates understood and became familiar with the meaning of "OL Caurette", Jackson wrote "OK", which stands for "Orr Caurette".
Oll Korrect is essentially a spelling mistake of All Correct, so why did Jackson make a spelling mistake? From the perspective of the history of Chinese teaching in the United States, English phonetics was founded and developed in the early 20th century, but Jackson in the19th century may not have noticed that the monosyllabic letter C has two pronunciations, namely [S] and [K]. So when he spelled the word Correct, he might think that the letter [K] should be the letter K, so he wrote Korrect.
As for why Jackson wrote All as OL, the reason is that when phonetic teaching was not developed, people in English-speaking countries, including British and American nationals, thought that A had only two pronunciations, namely [[〔ei〕] and [a:], but they didn't know that A could pronounce the vowel O before the consonants L and W, so President Jackson pronounced ALL as OL. In this way, Jackson wrote all the correct ones as Oll Korrect. Once the misspelling was established, the abbreviation "OK" was born naturally. After more than 200 years of circulation, OK has become the most commonly used and widely circulated word, and has penetrated into the daily language of many countries that promote Britain as a second language.