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input devices 
Electronic devices used to transmit data and commands to a computer.
capitals lock
Activation or deactivation of the continuous keying of capital letters.
tabulation left
Movement of the cursor to the field or tab stop preceding it.
tabulation right
Movement of the cursor to the field or tab stop following it.
escape
Cancellation of a current operation or exit from a given situation.
end
Movement of the cursor to the end of a line or document.
home
Movement of the cursor to the beginning of a line or document.
break
Halting of the current operation.
page down
Display of the next page screen.
page up
Display of the preceding page screen.
pause
Momentary pause of the current operation.
insert
Activation or deactivation of the overwrite mode; this allows existing characters to be replaced by new characters during data entry.
numeric lock
Activation or deactivation of the numeric keypad.
delete
Deletion of a selected object or character immediately to the right of the cursor.
