What is the difference between UNIX, LINUX, DOS OPERATING SYSTEM?

what are similarities %26amp; difffernec between LINUX, UNIX and DOS ?

What is the difference between UNIX, LINUX, DOS OPERATING SYSTEM?
Linux is modeled on Unix, but developed independently, and is free, open sourced software. Unix, in its many flavors is propriatery, although I think Sun might have open sourced their version of Unix, but I could be very wrong.





Linux / Unix are very powerful, multi-user capable systems, and can be run either from command line or through GUIs. I am not sure what limitations Unix has in terms of using the numerous GUIs that run on Linux.





I think Unix is more hardware demanding than Linux, but I could be wrong.





DOS is a command line OS, single user, much less powerful than Linux or Unix. Many commands for DOS were also present in (and copied from?) CP/M. Many Linux/Unix commands are different from those of DOS.
Reply:There is alot to talk about but go to http://wiki.answers.com/Q/What_is_the_di...


That will help a lot. Email if you still have more questions.