If you still think that operating systems are tied to hardware, you need to update your thinking; nowadays there are lots of options that let you run one operating system within another or in parallel ...

If you use the Microsoft Windows 7 operating system on the computers at your business and need to run Linux or BSD programs on them, you can use Cygwin, a Linux-like environment for Windows computers.

Windows only: If you need your Unix command line on a Windows PC, chances are you use a terminal emulator like Cygwin—and if you do, you want to check out MinTTY. The MinTTY terminal window for Cygwin ...