The PDP-10, also known as the DECsystem-10 and the DECsystem-20, was among the most famous and popular 36-bit computers. Digital introduced its first 36-bit computer, the PDP-6, in 1964. The product was not a success. Digital relaunched the family, with a new design, as the PDP-10 in 1966, and shipped the first systems in 1967. In all, Digital brought six 36-bit designs to market:
| Option | Description | Capacity |
| CPU and memory | KS10 | 1MW |
| IO bus | dual Unibus | |
| Console | 8080-based front end processor | |
| Paper tape | PC11 paper tape reader and punch | |
| Timer | built in | |
| Time of year clock | TCU150 (from Digital Pathways) | |
| Line printer | LP20 line printer | |
| Terminal multiplexor | DZ11 terminal multiplexor | 8-32 lines |
| Disk | RH11/RM03, RM05 disk packs | 67-256MB |
| RH11/RM80 non-removable disk | 124MB | |
| RH11/RP04 (RP05), RP06 disk pack | 87-174MB | |
| RH11/RP07 non-removable disk | 516MB | |
| Floppy disk | RX211/RX02 floppy disk | 512KB |
| Magnetic tape | RH11/TU45 800/1600bpi 9 track magnetic tape | |
| Card reader | CD20 (CD11) card reader | |
| Network | DEUNA Ethernet interface |
Updated 08-Aug-2020 by Bob Supnik (simh AT groups DOT io - anti-spam encoded)
