Contents of the "tops20" sub-archive for UnZip 5.3 and later:

  Contents       this file
  make.mic       command file to make UnZip and ZipInfo with KCC
  rename.mic     command file to rename Info-ZIP filenames to KCC format
  tops20.c       TOPS20-specific routines for UnZip

This port has not been updated since version 5.0.
