The source has a distinct face-melting vibe. Judging from leftover variables, seems like part of the original plan was to make a 7-way Venn diagram of these broad disciplines: "ART INTERFACE SCIENCE LANGUAGE TECHNOLOGY HUMANISM NETWORKS".
The possible resulting combinations also seem to have remained in the code, going from tame concepts like "illustration" and "games", down to gems like "folksonomy", "hypernarrative", "facebook" (??)