MUPID
The MUPID (short for "Mehrzweck Universell Programmierbarer Intelligenter Decoder" in German) was an early home computer like system (1981-1983) designed and invented by Hermann Maurer for the University of Graz to be used as a Bildschirmtext terminal, but it was also capable of being used as a stand-alone computer.
At the time it excelled in having advanced color graphic capabilities.
It was followed in 1983 by the MUPID II.
A card for older IBM PC-compatibles with an ISA slot was developed that gave a PC the same graphics capabilities as a MUPID.

References

Home computers
Videotex
Telecommunications in Germany
Z80-based home computers