Journalist Charles Gordon Greene was responsible for the first confirmed use of the word OK in the March 23, 1839 issue of the Boston Morning Post.It was found in a humorous article about their rival paper, the Providence Journal.
There are a few theories about the origins of OK, and some of them make perfect sense.
One such theory is that OK stems from the Scottish phrase of agreement, “och aye”. After all, OK also conveys agreement or acquiescence, and both och aye and OK sound similar. Surely that’s the most sensical answer, right? Well, it might be sensical, but it’s wrong.
The next theory is that OK comes from the Choctaw word “okeh”, which translates to “it is so”. Again, both words sound phonetically similar, and they both convey similar ideas. This explanation also makes sense! But it’s still wrong.