Wiktionary
n. (plural of function key English)
Usage examples of "function keys".
He could look back on a past with function keys and five-and-a-quarter-inch disks, and when booting up your computer meant a whole series of commands and disturbing messages (bad command or file name).
Then he became engrossed, fingers stabbing at function keys, tapping out new requests.
The top surface was divided into an LCD screen and a set of special function keys including a Scroll command which allowed the viewer to scan blocks of copy by moving them line by line upwards or downwards across the screen at varying speed.
Godwin had patiently stuck small pieces of address label on each of the letter and function keys.
The keyboard had a row of function keys at the top, just like a regular PC keyboard, and the monitor was big and in color.
No longer did I have to head out into the hinterlands of the Function Keys to find where they had put my capitals.
On the left, instead of function keys were twenty square touchpads, each labeled with a single word.
Aside from the regular QWERTY keyboard, there were a dozen special-function keys labeled F1 through F12, and several others marked DIN, DON, and RES.