Also known as | PDP-20 |
---|---|
Developer | Digital Equipment Corporation |
Product family | Programmed Data Processor |
Type | Mainframe computer |
Release date | 1977 |
Operating system | TOPS-20 |
Platform | DEC 36-bit |
Related | PDP-10 |
The DECSYSTEM-20 was a family of 36-bit Digital Equipment Corporation PDP-10 mainframe computers running the TOPS-20 operating system and was introduced in 1977.
PDP-10 computers running the TOPS-10 operating system were labeled DECsystem-10 as a way of differentiating them from the PDP-11. Later on, those systems running TOPS-20 (on the KL10 PDP-10 processors) were labeled DECSYSTEM-20 (the block capitals being the result of a lawsuit brought against DEC by Singer,[citation needed] which once made a computer called "The System Ten").[1] The DECSYSTEM-20 was sometimes called PDP-20, although this designation was never used by DEC.