Initially...

[Gnisy]

What does the W.C. outside the toilet door stands for?
And what does the P.S. at the bottom of letters or memos stand for?

[Drusilla]

Water closet, which is just an old fashioned name for the loo and post script, which is a message at the end of a letter.

[brian j john]

ps ,,, post script

[brian j john]

oops!! just seen it was answered

[jno]

water closet dates from the days when it might well equally have turned out to be an earth closet. PS from post scriptum ('after the script') in Latin, now called a postscript in English

[Gnisy]

Well whatdayaknow.. a closet. That's the last thing I'd figure the C would stand for. Thanks for all the answers.

P.S. Xcus me yl i go d W.C.