This software lets you take one host PC server and this lets you virtualize servers. In Walton County - have 100 servers and 60 are virtual. All independent and have their own IP address and appear completely independent -- they have 6 blade servers. This does cost money.
This would let me move the Accelerated Reader and Accounting system to separate "virtual servers" and if one needed to reboot, I could reboot a "virtual server" and not the physical server.
This is from an expert IT - Jack Higgins, Network Analyst - Walton County schools in Atlanta, GA -- met by accident in the Atlanta airport. A lot of these bookmarks are from him!
VirtualBox is a powerful x86 virtualization product for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL). See "About VirtualBox" for an introduction.
Presently, VirtualBox runs on Windows, Linux, Macintosh and OpenSolaris hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista, Windows 7), DOS/Windows 3.x, Linux (2.4 and 2.6), Solaris and OpenSolaris, and OpenBSD.