4 OSes on my PC at Once

[Bill (Smithville NJ)]

If you have Virtual Box running, and plenty of memory, then you can have a multitude of operating systems running. Some time ago, I played around trying to see how many different operating systems I could have running at same time. Came up with the following: Windows 7 (Host Computer), Windows XP, Windows 98, CP/M-86, FreeDos, MSDos 6.2, Xenix 286, Xenix 386, Slackware Linux 7.1, Mark Williams Coherrent.

A couple of years ago at work, we had a Windows 7 machine that had an older virtual Windows server and then that Windows Server had another virtual server running on it with the final database system running in that server. I didn't set this system up. We had a "creative" computer consultant that set up this convoluted system. I remember the database system was an out of date server based system, but never totally understood why he had several layers of virtual machines running. Last year they finally upgraded the database system and was able to go with a normal windows system without all the virtualization.

Bill