Digital Equipment Corporation developed many operating systems for its various computer lines, including TOPS-10 and TOPS-20 time sharing systems for the 36-bit PDP-10 class systems.
Digital Equipment Corporation vyvinulo mnoho operačných systémov pre rôzne rady svojich počítačov, vrátane TOPS-10 a TOPS-20 systémov s podporou prideľovania času pre 36-bitové PDP-10 systémy.