||Proc::ProcessTable has access to the sort of information
found in programs like top and ps. This sub finds
the memory usage of the program that calls it.
Proc::ProcessTable currently works on windows,
linux, solaris, aix, hpux, freebsd, irix, dec_osf,
bsdi, netbsd, unixware 7.x and SunOS.
The windows port requires the Cygwin environment.