2. n. The `clover' or `Command' key on a Macintosh; use of this
term usually reveals that the speaker hacked PCs before coming to
the Mac (see also {feature key}). Some Mac hackers,
confusingly, reserve `alt' for the Option key. 3. n.obs. [PDP-10;
often capitalized to ALT] Alternate name for the ASCII
ESC character (ASCII 0011011), after the keycap labeling on some
older terminals. Also `altmode' (/awlt'mohd/). This character
was almost never pronounced `escape' on an ITS system, in
{TECO}, or under TOPS-10 --- always alt, as in "Type alt alt to
end a TECO command" or "alt-U onto the system" (for "log onto
the [ITS] system"). This was probably because alt is more
convenient to say than `escape', especially when followed by
another alt or a character (or another alt *and* a character,
for that matter).

:alt bit: /awlt bit/ [from alternate] adj. See {meta bit}.

:altmode: n. Syn. {alt} sense 3.

:Aluminum Book: [MIT] n. `Common LISP: The Language', by
Guy L. Steele Jr. (Digital Press, first edition 1984, second
edition 1990). Note that due to a technical screwup some printings
of the second edition are actually of a color the author describes
succinctly as "yucky green". See also {{book titles}}.

:amoeba: n. Humorous term for the Commodore Amiga personal computer.

:amp off: [Purdue] vt. To run in {background}. From the UNIX shell `&'
operator.