Zip version 1.0, Copyright 1992 by Access Success.

ZIP returns the zip code(s) given a city and state, with quick and
easy operation from the DOS prompt.  It is distributed in one or
two archives containing the following files:

ZIP.TXT -- The documentation file in ASCII text format.

ZIP.EXE -- The executable file, compiled in the Clipper 5.01
programming language.

ZIP.DBF -- A public domain database file in DBASE format,
containing 43,318 records of city, state, zip combinations in the
U.S.

README.TXT -- This file.