SDF Public Access Unix System
This may be the appropriate place to gratefully mention Polarhome (<a href="http://www.polarhome.com/" rel="nofollow">http://www.polarhome.com/</a>), that for many years managed a "dinosaur zoo" of ageing Unix systems, on which one could buy a login for a nominal fee. Very convenient for me as developer of a portable Unix utility (rlwrap) - it allowed me to spot many portability problems (often real bugs that manifested themselves only on certain systems).<p>Sadly, Polarhome has thrown in the towel. Does anyone know of something comparable, i.e. not only a public access Unix system, but one that offers a range of Unices?