32-bit, 32bit or 32 bit in documentation?

[Andreas Jaeger]

Looking at md.texi I noticed that different authors used different
typing conventions.  What is the preferred way:
"32-bit", "32bit" or "32 bit"?

I'll send a patch for md.texi after getting some advise.

Thanks,
Andreas
-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj