What form should the acronym dictionary take?

[tbontob]

Hmmmmmmmm

That's an idea...

A short dictionary of acronyms in common usage

followed by

A dictionary of all the acronyms.

Difficult to do in a spreadsheet.

However, we can easily do this:

A short dictionary of acronyms in common usage

followed by

A large dictionary of acronyms not in common usage.

So, if a person can't find it in the first dictionary, he looks at the second one.