@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.