Max, the IRIS Window Manager was the name of the window manager for the 4Sight Window System used by Silicon Graphics for its IRIS-4D family of workstations from 4D1-3.0 through IRIX System V Release 4D1-3.3.3L.
Amy Smith (1988). Personal Iris Owner's Guide. Version 1.0. Silicon Graphics, Inc. c. 2-5. Document Number: 007-9000-010