It was on September 19, 1982 that Carnegie Mellon University professor Scott Fahlman first typed out the emoticon happy face on an online computer science board.
This is precisely what he wrote:
I propose that the following character sequence for joke markers:
Read it sideways. Actually, it is probably more economical to mark things that are NOT jokes, given current trends. For this, use
That was the beginning and the idea spread to other universities and eventually the rest of the web.
Happy Birthday 🙂