[[Image:ATMscreen.jpg|thumb|right|300px|ATM in [[Mercer Island, Washington]] with function keys]]
'''Screen-labeled function keys''' are a special case of [[function keys]] where keys are placed near a screen, which provides labels for them. These are most commonly found in kiosk applications, such as [[automated teller machine]]s and [[gas pump]]s. TheyThese originateddate to the late 1960s, and were particularly common in the 1980s and 1990s. An alternative to screen-labeled function keys is buttons (virtual keys) on a [[touchscreen]], where the label is directly pushable. The increased prevalence of touchscreens in the 2000s has led to a decrease in screen-labeled function keys. However, screen-labeled function keys are inexpensive and robust, and provide tactile feedback.
==History== Early examples are found in aviation cockpits[[glass cockpit]]s, such as the Mark II avionics of the [[F-111111D]] in the late 1960s/early 1970s.{{Citationneeded|date=May(first 2012}}ordered 1967, delivered 1970–73). [[Hewlett-Packard]] developed them for use in computers/calculators in the 1970s.{{Citation needed|date=September 2008}} The [[HP 9830]] desktop computer was the first calculator with two rows of 4 keys, over which a paper overlay would be placed. These were later adapted to terminals. Programmers found that the [[HP 2640]] terminals could lock the top two lines of the screen, so they displayed the key functions there. Starting with [[HP 2647]] terminal, the keys were re-arranged to correspond with 2 pairs of 4 labels at the bottom of the screen. These could be programmed by [[escape sequence]] or [[configuration screen]]. This would be further developed on the failed [[HP 300]] Amigo, which used keys at the right side of the screen and [[HP 250]] business computers which placed them at the bottom. By arranging functions in hierarchical trees, many functions can be implemented with only 8 keys.
