UNIX. Most WWW browsers under Unix OS's (e.g. Netscape) have implemented automatic
piping procedure so you will not be prompted and the browser will automatically
gunzip file.ps.gz and subsequently will call the built-in postscript viewer like
e.g. ghostscript.
Open your favorite browser and the following capabilities
(Netscape4.7: Edit->Preferences->Navigator->Applications)
application/postscript; ghostview %s
application/x-gzip; gunzip %s