Xen

Xen is a special type of software that helps computers run multiple operating systems at the same time. It's like having different rooms in a house, where each room has its own rules and people living inside.

When you turn on a computer, it typically starts with one operating system, like Windows or macOS, that controls everything on the computer. But with Xen, you can create different "rooms" or virtual machines, each running its own operating system.

For example, you could have one virtual machine running Windows and another running Linux. This is helpful because it means you can use certain programs or software that might not work on your main operating system. Imagine if you could use a toy that only works on one floor of your house in another floor without having to move it around.

Xen works by dividing up the computer's resources, like its processor and memory, and allocating them to each virtual machine as needed. It's kind of like having a parent divvy up snacks so everyone gets a fair share.

Overall, Xen makes it possible for one computer to do the work of many, without having to buy or maintain separate machines for each operating system.