Running an operating system in your web browser is easier than you might think, and there are a few options you can try right now.

Basically it’s an operating system that uses a Linux kernel, the WINE compatibility layer for Windows applications, and the ReactOS userland, plus a few other odds and ends to let you run Win32 apps.

Most computers come with just one operating system, which is usually all you need. However, if you feel like trying out a different one later, you don't need to get a whole new computer. Dual-booting ...