Those old CD games that have been sitting on your shelf for eternity? Linux can run them.

I had two hard drives. One was my 98 and the other was my SuSE and the SuSE ran it's boot program i think LILO and i could then boot to 98. I blew away my linux install and now Windows 98 won't boot ...

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.