This utility is the Generalized File Selector, command line association.
(2008/09/16)
This REXX code is incorporating the File Selector, editable for
associations to launch programs by file type. View into .ZIPs;
excellent for browsing into downloads:
* it invokes Firefox, VIEW, or TEDIT automatically
-> URL: http://hobbes.nmsu.edu/h-search.php?key=GFilSel1.ZIP
Source: OS2.org