Very little about PetrOS is known. Trumpet says PetrOS won't take up much memory and can be upgraded over the Internet. Yet PetrOS could also boost Microsoft by keeping corporate users from ditching their Windows software. The wording of the PetrOS press release suggests that the new operating system has a long way to go before it's ready for sale. Trumpet Software is asking those who test the software to help determine what the operating system will eventually do, a sign that many features are not yet ready for scrutiny.
Programmers use three methods to run software from one operating system within another one.
This is usually slow, but works quite well otherwise. Apple Macintosh computers use this method, through a program called VirtualPC, to run Windows and just about all Windows programs. A Windows emulator for Linux called VMWare also uses this technique. The second method provides emulation for single programs. A popular Windows emulator for Unix and Linux called Wine uses this technique.