-
GM-NAA I/O, produced by General Motors and created by Robert L. Patrick and Owen Mock. The price was US $1,995
-
OS/360 for large and mid range systems and DOS/360. Both created by IBM.
-
Developed by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, Michael Lesk and Joe Ossanna.
-
Apple DOS was largely written by Steve Wozniak, Randy Wigginton, and outside contractor Paul Laughton.
-
Created by Microsoft and designed by its assembly with Bill Gates
-
Designed by Apple. Programmer John Raskin
-
Designed by Microsoft. Created by Bill Gates