Delete
It's all a play of time and fashion. The original term OK was originated in America back in the 1830s which actually was an abbreviation to the misspelled term "Oll Korrect". The word "Okay" didn't appear until 1895.
Nowadays, as you may already know that OK is widely used around social media thus is fashion but it too has got funny alternatives such as Okie Dokie, K, Okeh, ...
31 Answers