The word "OK" is the most frequently and widely spoken word in the world, according to research many years ago by the Coca Cola Company. Because its is spoken by many people every day, there are situations in which it also serves as a brand name or company name, i.e written in some form connecting with something.
For example, theres a popular dating site called OKCupid, as well as a weekly magazine for teens just called "OK". There were used car lots years ago called "OK Used Cars and Trucks". and a shoe repair place I've seen called simply, OK Shoe Repair. Have you seen any examples ? (note a 2011 book titled, OK: The Improbable Story of America's Greatest Word.)
Where have you seen the word OK written and on public stand alone presentation ? Take me a photo. Thanks.