PDP-10 Model KL-10 1975 Digital Equipment Corporation, United States First introduced in 1966, the PDP-10 evolved into five basic designs over the next eighteen years. Many university computer facilities and other research agencies employed PDP-10 mainframes as timesharing computers capable of simultaneously supporting multiple users. Based on DEC's revolutionary PDP-6, the PDP-10 was used for much of the early work on artificial intelligence. The PDP-10 was also beloved by the early "hacker" community. During this era, most hackers were irreverent, but not malicious, programming experts who attempted to use computers in new and clever ways. Memory Type: Core Speed: 1,000,000 Add/s Memory Size: 56K Cost: $100,000 + Memory Width: (36-bit)