What are ZMZN and ->Z1T in a ghc space profile?

senganb@ia.nsc.com senganb@ia.nsc.com
Fri, 16 Nov 2001 04:09:32 -0500

I searched on google, but had no luck.
My program is an implementation of 
in haskell, and the dictionary read in is rather large
(900Kb) so I assume most of the space should be [[Char]]