Editing Programmed Data Processor (section)

==Related computers==
* [[TX-0]] designed by [[Massachusetts Institute of Technology|MIT]]'s [[Lincoln Laboratory]], important as influence for DEC products including Ben Gurley's design for the PDP-1.  When the memory was replaced with a smaller one, the instruction set was expanded, and it was moved to the MIT campus.  When a PDP-1 arrived on campus, it was placed in the next room.  Software such as an assembler was ported from the TX-0 to the PDP-1 and the machines were connected for communications between them.
* [[LINC]] (Laboratory Instrument Computer), originally designed by [[Massachusetts Institute of Technology|MIT]]'s [[Lincoln Laboratory]], some built by DEC. Not in the PDP family, but important as progenitor of the PDP-12. The LINC and the PDP-8 can be considered the first [[minicomputer]]s, and perhaps the first [[personal computer]]s as well. The PDP-8 and PDP-11 are the most popular of the PDP series of machines. Digital never made a PDP-20, although the term was sometimes used for a [[PDP-10]] running [[TOPS-20]] (officially known as a [[DECSYSTEM-20]]).
* Several [[PDP-11#Unlicensed clones|unlicensed clones of the PDP-11]].
* [[XKL#TOAD-1|TOAD-1]] and [[XKL#TOAD-2|TOAD-2]], [[Foonly]], and [[Systems Concepts]] PDP-10/DECSYSTEM-20-compatible machines.