# Two equal acronym - What should I do?

I'm using the acronym package.

I have in two chapters the acronym MAC one time for "Media Access Control" and in the second chapter as "Message Authentication Code".

How can I use both MACs?

Is a other package better?

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Maybe the answer to this question will answer yours too: tex.stackexchange.com/questions/42214/… –  Philipp Jan 26 '12 at 12:10

You definitely should use different acronyms/abbreviations for the two. Otherwise, it wouldn't be possible to distinguish between the two.

You could typeset one in small caps (\textsc{}) and one in a monospaced typeface (\texttt{}) but it's not ideal.

Another solution is using \textsc{mac} for media access control and \textsc{ma}u\textsc{c} for message authentication code.

BTW, your problem isn't that uncommon. For example, consider the abbreviation CSP. I've found the following different usages:

• Communicating Sequential Process;
• Constraint Satisfaction Problem;
• Constant Sign Partition;
• 192 more abbreviations omitted
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For small caps, use \textsc{mac}, not \textsc{MAC}. The latter looks just like MAC. –  Michael Palmer Jan 26 '12 at 16:35
@MichaelPalmer Thanks. I've corrected it. –  Marc van Dongen Jan 26 '12 at 19:43