PDC-03 Portable Computer

Well, sortof.  It has handles on both sides so two people can carry it.  On the front (back?) panel are the TU58 transports for the machine to boot from and serial ports for the controlling terminal (that needs a third person to carry it).

Inside is a dual-width LSI-11 backplane with an LSI-11/2 CPU, 30 kwords of memory, a clock card, 4-way D-A, 16-way A-D and a 4-port DLV-11J-compatible serial card.  (One of the ports connects the TU58 transports.)  The back (front?) panel has sockets for test-leads.  There is no boot ROM; the TU58 is rigged into boot mode and the CPU starts in MicroODT, so that the TU58 loads its bootstrap directly into ODT to start the system.  Like having a robot attached to an old fashioned front panel, in a way.

Originally used for calibrating turbines in hydro-electric power stations.