Hi, JD,
The ones you quoted are considered valid abbreviations of "picofarad"
(unit of capacitance), "month", and "weight" respectively.
I'm not sure whether you're asking to have the others accepted (in
which case you should click the Add button to put them into your
custom dictionary) or to have the first three flagged as errors (add
them to an exclude dictionary, as described at
http://word.mvps.org/FAQs/General/ExcludeWordFromDic.htm).
>How come Word 2002 spellcheck does not catch some two
>letter words like "Pf", "mo", "wt", but does catch
[quoted text clipped - 3 lines]
>
>-JD
--
Regards,
Jay Freedman
Microsoft Word MVP FAQ: http://www.mvps.org/word