DEC BATCH-11/DOS-11
              < DEC BATCH-11 
 
            
          | Developer | Digital Equipment Corporation | 
|---|---|
| Written in | FOCAL, Fortran-IV, MACRO-11, TECO | 
| Working state | Discontinued | 
| Source model | Closed source | 
| Initial release | 1970 | 
| Latest release | V09-20C / June 1974 | 
| Platforms | PDP-11 | 
| Default user interface | Command-line interface | 
| License | Proprietary | 
BATCH-11/DOS-11, also known simply as DOS-11, is a discontinued operating system by Digital Equipment Corporation (DEC) of Maynard, Massachusetts. The first version of DOS-11 (V08-02) was released in 1970 and was the first operating system to run on the Digital PDP-11 minicomputer. DOS-11 was not known to be easy to use even in its day and became much less used in 1973 with the release of the RT-11 operating system.