NVM - Nevermind
k - also means "ok" easier than kk by one keystroke and just as silly.
FYI - For your information
Heres a few FYI's:
"Aye" is not an acronym or abbreviation, its a word, and it doesnt mean "Yes" it is in an affirmative response, similar to "Yes" but not the same.
"C'mon" (self explanatory) is neither, its a slang term.
Please lets not start with the O_o stuff, those are more akin to smilies not acronyms.