PDT-11/110, 11/130, 11/150
1978. PDT stands for "Programmable Data Terminal". This could have been the precursor of the PC, but it was marketed as an intelligent terminal. The basic PDT-11/110 was built into the case of a VT100, and had no peripherals. The /130 had two TU58 Dectape II drives mounted under the CRT, and the /150 (pictured to the left) had two "8 floppy drives (RX01 equivalents) mounted under the CPU. The terminal was a normal VT100 or VT52 (or any other serial terminal) in that case. The normal setup can have up to 60kBytes of memory, console-, terminal-, modem- and printer interfaces.
The operating system was RT-11.