Recommended minimum hardware and software requirements for TowManager3:

Windows XP SP2, Windows Server 2003 SP1, Windows Vista, Windows 7
1000+ MHz Intel Pentium/AMD Athlon Computer with
512 MB RAM (XP), 1 GB (Vista, Windows 7)
16 GB. Hard Drive

Computer & Communications Sciences recommends Windows XP Professional, Windows Vista Business, or Windows 7 Professional for Business use

High speed Internet connection for paging, GPS options, and for remote technical support.

You may download a demo of TowManager3 from here.