In Hamlet on the Holodeck, Janet Murray argues that digital environments have four essential properties. They are procedural, participatory, spatial, and encyclopedic. They are procedural because software is an authored set of procedures, which can be used to “write rules . . . that are recognizable as an interpretation of the world.”[2] Her focus is on storytelling, but we will see that any piece of software can be seen as an expressive, rhetorical model of a system. In addition to being procedural, digital environments also invite participation in that their rule-based behaviors are “responsive to our input” and they also “represent navigable space.”