Function key
<hardware> (From the
IBM 3270 terminal's Programmed Function Keys (PF keys)) One of a set of special keys on a computer or
terminal keyboard which can be programmed so as to cause an
application program to perform certain actions.
Function keys on a terminal may either generate short fixed sequences of characters, often beginning with the
escape character (
ASCII 27), or the characters they generate may be configured by sending special character sequences to the terminal.
On a
microcomputer keyboard, the function keys may generate a fixed, single byte code, outside the normal
ASCII range, which is translated into some other configurable sequence by the keyboard
device driver or interpreted directly by the
application program.
