Meaning of :-) in English
This odd symbol is one of the ways a person can portray "mood" in the very flat medium of
computers--by using "smiley faces". This is "metacommunication", and there are literally hundreds
of such symbols, from the obvious to the obscure. This particular example expresses "happiness".
Don't see it? Tilt your head to the left 90 degrees. Smiles are also used to denote sarcasm.
Internetworking Terms English vocab. Английский словарь межсетевых терминов. 2012