Function key
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A function key is a key on a computer or terminal keyboard that can be programmed to cause the operating system or an application program to perform certain actions, a form of soft key. On some keyboa
Flexowriter keyboard (1968) with 13 function keys on the right
Keyboard with 24 function keys
Scroll Lock
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Scroll Lock or ScrLk is a lock key on most IBM-compatible computer keyboards. Depending on the operating system, it may be used for different purposes, and applications may assign functions to the key
The scroll-lock key with an activated indicator light on an IBM Model M keyboard