Quote from "A Retrospective on the Dorado" - PDP-10/maxc GitHub Wiki

Lampson, Ed McCreight, Gene McDaniel, and several others had worked on the MAXC time sharing system [4]

[4] Fiala, E.H. The Maxc Systems. Computer 11, 5, May 1978, 57-67

Source: http://bitsavers.org/pdf/xerox/parc/techReports/ISL-83-1_A_Retrospective_on_the_Dorado_A_High-Performance_Personal_Computer.pdf