Today we're happy to celebrate the birthday of the Smiley, mostly used set of the punctuation symbols that people use everywhere, even in business letters.
There are a lot of suppositions about the origin of the sign and one of them is based on the letter of Scott E. Fahlman, the professor of Carnegie Mellon Unversity, where the smiley appeared for the first time:
19-Sep-82 11:44 Scott E Fahlman :-) From: Scott E Fahlman 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 :-(Well, nowadays people can't imagine their sms or skype message without happy smiley. Long live the Smiley! :-)