what's HQ short for?

what's HQ short for? What's "PS" short for? What’s short for a____?It’s ad. Mp3 short for what ? What is "KFC" short for? “EP"is short for what? What is "KTV" short for? What is MSN short for? what is F1 short for? What is BAFTA short for? 首字母填空：What's the short form for a____?It's ad. Short for 'It‘s'是什么意思