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)
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Albert Clifford
Athletico Club
On a regular calculator, you just leave it it will off itself. On a scientific calculator, press shift AC.
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It stands for athletico club.
AC Cars Group LTD. is a British Automobile Manufacturer.