An extension of their existing line of VT100 terminals, this version integrated a Z80 microprocessor and two (or four) external 5.25-inch floppy disk drives. It ran CP/M software and was codenamed "Robin".
Digital later released a full-fledged PC known as the Rainbow-100 as the successor to Robin.
When Digital ended the VT100 family, it also discontinued Robin. No direct replacement was offered, although the Rainbow 100 eventually provided a superset of Robin's functionality.
References
^ DEC Educational Services (February 1983). VT180 Series Technical Manual. Digital Equipment Corporation.