OPERATING SYSTEMS

UNIX Op sys of the Internet and other servers. A networking op sys. Developed at Bell Labs of AT&T. Further developed at Berkeley, and SCO. Open to public use.  PSC uses "FreeBSD", a Unix variation. 

Linux is a relatively recent variation of Unix.  Said to be very "robust" (i.e. doesn't crash), maintained by freewheeling unpaid group

DOS [MS-DOS, PC-DOS] Bill Gates's first big hit. He wrote the original MS-DOS for the original IBM-PCs. DOS was the platform for the original Windows interface (which ran on top of DOS)

WindowsNT A true operating system unto itself, with multitasking and multiuser (networking) capabilities built into system (see also article)

VMS Virtual Memory System. Created by Digital Equipment Corp

OS/2 IBM's upgrade of PC DOS. An expensive failure in the marketplace.

System7 for the Apple Mac System 8.5 newer op system for iMac

Rhapsody was being developed by Apple.