The Three Rivers PERQ is a bitmapped personal workstation developed in response to a contract offered by CMU as part of the Spice project. The PERQ has roots in the PARC Alto and Dolphin. One of the designers of the Dolphin was a principal designer of the PERQ.

PERQ information at

Parallel Developments
Xerox Alto - Xerox Dorado - Three Rivers PERQ - ETH Lilith
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