Short for Programmable Data Processor, PDP was a series of computers developed by Digital. The first PDP, and first minicomputer, was the PDP-1. It was developed in 1960 and had five-megacycle circuits, a magnetic core memory, and fully parallel processing with a computation rate of 100,000 additions per second. The PDP series included the PDP-4, PDP-6, PDP-7, PDP-8, PDP-9, PDP-10, PDP-11, PDP-12, PDP-14, and PDP-15 computer.
Also see: Parallel processing