The unit of the computer system that directs and supervises other units is called the

An opening on the motherboard of a system unit where expansion cards can be inserted is known as

Headers and footers are used in Microsoft Word documents to

If today's date is 02/02/2008, what will be the result of typing "=today() - 1" in a cell of a spreadsheet?

The act of translating data into a secret code is known as