TOPS-20
Operating system
>
The TOPS-20 operating system by Digital Equipment Corporation is a proprietary OS used on some of DEC's 36-bit mainframe computers. The Hardware Reference Manual was described as for "DECsystem-10/DECSYSTEM-20 Processor". Wikipedia
Developer: Digital Equipment Corporation and Raytheon BBN Technologies
License: Proprietary software
Programming language: Assembly language
Default user interface: Command-line interface
Marketing target: Mainframe computers
OS family: TENEX
Working state: Discontinued