Editors' Note: VNC is available for general use under the conditions of the GNU General Public Licence. You should be aware of the terms and conditions of this licence, which is also contained in the distribution itself.
RealVNC is remote control software which allows you to view and interact with one computer (the "server") using a simple program (the "viewer") on another computer anywhere on the Internet. The two computers don't even have to be the same type, so for example you can use VNC to view an office Linux machine on your Windows PC at home. VNC is freely and publicly available and is in widespread active use by millions throughout industry, academia, and privately.