Multics
Operating system
Multics is an influential early time-sharing operating system based on the concept of a single-level memory. Nathan Gregory writes that Multics "has influenced all modern operating systems since, from microcomputers to mainframes." Wikipedia
Programming languages: Assembly language and PL/I
Initial release date: 1969
Developer: Ken Thompson, Nokia Bell Labs, Massachusetts Institute of Technology, and more
Available in: English Language
License: Proprietary software and MIT License
Default user interface: Command-line interface