Modern personal computer has enough computing power for sharing it among multiple users with comfort. Multiseat technology is concerned with sharing of one computer base unit among multiple users. It’s done by connecting to existing base unit of  additional monitors, input devices (keyboards, mice and joysticks) and USB or PCI audio devices. For example, you can share your computer with your family members by using a second video output for connecting second monitor and USB-connectors (and USB-PS/2 adapters if needed) for connecting the additional keyboard and mouse. By adding a new graphics card you will get more than two additional seats.