Generally All Clear, though it is usually CA for Clear All. This clears the display and all internal registers except possibly (M+, MR) memory, which is cleared separately with the CM key.
All Clear
AC stands for all clear on a calculator
all clear
On normal calculator, press 'Off'. If your calculator doesn't have this button, the calculator will turn off automatically after some time. On scientific calculator, press 'shift' and press 'AC'. (depends on your version of the calculator)
Athletico Club
Albert Clifford
alter. curent
appelation controlle
On a regular calculator, you just leave it it will off itself. On a scientific calculator, press shift AC.
It stands for athletico club.
attack cargo plane
AC Cars Group LTD. is a British Automobile Manufacturer.