The research was centered in three institutions: Carnegie Mellon University, Stanford, and MIT, and as described below, each one developed its own style of research.
Panyelehan puniki untengnyané ring tigang institusi: Carnegie Mellon University, Stanford, miwah MIT, miwah sekadi katlatarang ring sor, soang-soang nglimbakang pamargin seseleh ipun ngraga.