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"Firmware is programming that is inserted into programmable
read-only memory (PROM), thus becoming a permanent part of a
computing device. Firmware is created and tested like software
(using microcode simulation). When ready, it can be distributed
like other software and, using a special user interface,
installed in the programmable read-only memory by the user.
Firmware is sometimes distributed for printers, modems, and
other computer devices.
"IBM prefers the term microcode.
"A source: George McDaniel (ed.), IBM Dictionary of Computing,
Tenth Edition, McGraw-Hill, (1993)."
