IRIX Interactive Desktop (formerly called Indigo Magic Desktop) is a desktop environment normally used as the default desktop on Silicon Graphics workstations running IRIX. The IRIX Interactive Desktop uses the Motif widget toolkit on top of the X Window System found on most Unix systems. The default window manager on the IRIX Interactive Desktop is 4Dwm. IRIX Interactive Desktop debuted in September 1993 on the Indy workstation model. The IRIX Interactive Desktop was preceded by the IRIS Workspace in IRIX versions 3.0 through 5.0, and was one of the first default desktop environments to be standard on a particular Unix computer system.