Unix systems supported are:
Sun Solaris v8 & v9; Intel Linux (redhat v8, 9 tested); Apple MacOSX v10.2+
These packages are required, and commonly are preinstalled except for Solaris
Perl v5.6 or later - http://www.perl.com/
(Argos v0.7 note: current perls require /usr/local/bin/perl to exist)