Abstract of INFO-MAC archived encoded Mac binary file
   'dev/card/null-set-11.hqx'
  Uploaded 06/28/1997   65848 bytes

From: brj@fremontlaw.com
Subject: NullSet.sit


Nullset is a trio of Hypercard externals that handle the null character.
Null is ascii 0, and is treated inconsistently by Hypercard, which
sometimes sees it as a space, and sometimes sees it as an end of file
marker.  If you don't know what a null is or why you would need to deal
with it, you don't need Nullset.