"In just a few short months, an open-source software package called Xen has been catapulted from obscurity to the limelight as many computing industry powers throw their weight behind the project.
"Xen lets multiple operating systems run on the same computer, a feature that's useful for extracting as much work as possible from a single system. The technology is common among high-end servers today, but on mainstream systems it requires proprietary 'virtual machine' software from EMC subsidiary VMware..."
