... are always at least ten and sometimes twelve of these labelled F1 to F10 or F12, which are grouped together on the left of the keyboard or along the top of it. They are used by programs like word processors or spreadsheets to give instructions to the computer. They do not normally produce an effect on the screen but can do in some programs. The third part of the keyboard is the numeric key pad. This is situated on the right of the keyboard and serves two functions. Firstly, to move the cursor and secondly to type numbers into the computer. The keys on the keypad usually contain the numbers 0 to 9, the decimal point and the mathematical symbols. The key marked "NUMLOCK" is used to tell the computer if the pad is used to enter numbers (NUMLOCK ON) or to move the cursor (NUMLOCK OFF). Input - The ...

See this essay or coursework document in full right now