SHELL ARCHIVER recommendation soclicited

[Jun Lu]

There are quite a few free versions/flavors of shell archivers floating
around. Which one do you use ? Which do you recommend ? Comparisons of
efficiecy(small, fast) v.s. portability are welcomed ?  Any other facts are
also appreciated. If there is sufficient interest, I'll post a summary.

Follow-ups to comp.unix.questions.  If there is sufficient interest, I'll
post a summary on those e-mail responses(If you have objection to posting
any part of your e-mail to the world, please indicate in your mail.
Otherwise I may include part or whole of your reponses to the world if
a summary is requested). 

Thanks very much for your time and help.
-- Jun
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