The O stands for Old, not of. It is not Star Wars: The of Republic. It is Star Wars: The Old Republic. SWTOR. TOR for short. There is no reason for the O to be lower case.
Who started this ridiculous trend anyways?
I see you went from making post's in other peoples threads about this to your own thread about it, chill out man. And your correction is wrong you for got the colon 8)