Re: <abbr></abbr> - use once or use many?

> Whilst guidelines call for <abbr></abbr> to be used on the first
> occurrence of an abbreviation, I have always tended to use it on all
> occurrences, to save the reader having to go back to look for the
> definition, should they forget it.

That goes against pre-computer document conventions.  Generally, if
you repeat the full form, you don't need to use the abbreviation
at all in traditional documents.