`@acronym'{ACRONYM}
-------------------
Use the `@acronym' command for abbreviations written in all capital
letters, such as `NASA'. The abbreviation is given as the single
argument in braces, as in `@acronym{NASA}'. As a matter of style, or
for particular abbreviations, you may prefer to use periods, as in
`@acronym{F.B.I.}'.
In TeX and HTML, the argument is printed in a slightly smaller font
size. In Info or plain text output, this command changes nothing.