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The commands serve a variety of purposes:
@code{sample-code}
Indicate text that is a literal example of a piece of a program. See @code.
@kbd{keyboard-characters}
Indicate keyboard input. See @kbd.
@key{key-name}
Indicate the conventional name for a key on a keyboard. See @key.
@samp{text}
Indicate text that is a literal example of a sequence of characters. See @samp.
@verb{text}
Write a verbatim sequence of characters. See @verb.
@var{metasyntactic-variable}
Indicate a metasyntactic variable. See @var.
@env{environment-variable}
Indicate an environment variable. See @env.
@file{file-name}
Indicate the name of a file. See @file.
@command{command-name}
Indicate the name of a command. See @command.
@option{option}
Indicate a command-line option. See @option.
@dfn{term}
Indicate the introductory or defining use of a term. See @dfn.
@cite{reference}
Indicate the name of a book. See @cite.
@abbr{abbreviation}
Indicate an abbreviation, such as ‘Comput.’.
@acronym{acronym}
Indicate an acronym. See @acronym.
@indicateurl{uniform-resource-locator}
Indicate an example (that is, nonfunctional) uniform resource locator.
See @indicateurl. (Use @url
(see @url) for
live urls.)
@email{email-address[, displayed-text]}
Indicate an electronic mail address. See @email.