Meta key

The Meta key is a modifier key on certain keyboards. It first appeared on the Stanford Artificial Intelligence Lab (SAIL) keyboard in 1970[1] and successors such as the Knight keyboard, space-cadet keyboard[2], MIT Lisp machine, Symbolics keyboards, and on Sun Microsystems keyboards (where it is marked with a solid diamond “◆”).

Sun keyboard with Meta key (between space bar and Compose key)

Generally, the Meta key worked similar to Macintosh's Command key, in that when held down it modified letters and symbols into immediate commands (shortcuts). On all these keyboards, the Control key was placed closest to the space bar, then the Meta key outside Control. The space-cadet keyboard added the Super key outside Meta, and the Hyper key outside that. All these keys produced shortcuts (24 of them for every letter), but the Control ones were easiest to type and most popular, and the Meta ones second-easiest and thus second most popular. However, on most modern keyboards, the Control key is farthest from the space bar, reversing the convenience of shortcuts.

On keyboards that lack a physical Meta key, its functionality may be invoked by other keys such as the Windows key. However software often provides another workaround, such as using the Alt key (which does not exist on the Knight keyboard), or using the Esc key as a prefix (for example in Emacs). Because of these workarounds the need for Meta, despite being the most-used additional modifier key, was less than for other modifier keys. Thus it is more common today to use the Windows key to emulate the Super key.

gollark: Most AI stuff is just procedural generation based on tons of training data, and analysing correlations. Humor is, seemingly, actually very hard.
gollark: Idea: automatic humour generation from trending Twitter topics?
gollark: No. People are bad at longtermism.
gollark: Great! Everyone g o there.
gollark: Hmm, I'm not sure if derp can actually use <#471334670483849216>.

See also

References
  1. "SAIL Keyboard".
  2. Raymond, Eric S.; Steele, Guy L. (1996). The New Hacker's Dictionary. MIT Press. p. 420. ISBN 9780262680929.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.