Graphical Calculators
As of 2008, HP calculators use this arrangement to implement hierarchical trees of functions. They are rarely found on PC applications, even though the first IBM PC BASIC labeled function key use at the bottom of the screen, and there were 12 function keys, patterned after use on IBM terminals.
Modern Texas Instruments calculators such as the TI-89 series use function keys to open drop-down menus on their menu bar, the menu title acting like the key label.
Casio calculators use the function keys for a menu at the bottom of the screen.
Read more about this topic: Screen-labeled Function Keys
Famous quotes containing the word calculators:
“But the age of chivalry is gone. That of sophisters, economists, and calculators has succeeded; and the glory of Europe is extinguished forever.”
—Edmund Burke (1729–1797)