Carriage Discreteness—Yvonne Rainer’s contribution to the event series 9 Evenings: Theatre and Engineering organized by Experiments in Art and Technology (E.A.T.) and shown in 1966 in the 69th Regiment Armory—is an example of the analogies between notation systems and choreographic scores.
Roughly speaking, Carriage Discreteness consisted of two systems: first, each dancer was equipped with a walkie-talkie device to be worn on his or her wrist, by means of which he or she received instructions. The types and sequences of movement to be carried out by the performers were selected more or less spontaneously from a predetermined list of possibilities. In parallel, a media choreography was controlled electronically by a Theater Electronic Environmental Module (TEEM) system, in this case specifically by a program drum, which as a set of relays triggered events at fixed intervals. These media choreographies consisted of a compilation of movie fragments, slide projections, light changes, TV-monitored close-ups of details in the dancer-proper, tape-recorded monologues and dialogues, and various photochemical phenomena, several involving ultra-violet light.
The typescript that features in Rainer’s Work—a documentation of her scores—describes the construction of the piece: A TAPE RECORDED CONVERSATION; AND AUTOMATED MOVEMENT OF A BALLOON, PLEXIGLASS GLOBE, LUCITE ROD (ILLUMINATED), BLACK-LIT MATERIAL, GARBAGE PAIL, TIN CAN, COLLAPSIBLE WOOD PARTITION; AND CUED MOVEMENT OF A MAN IN SWING AND 4 PEOPLE IN THE AUDIENCE, 2 OF THEM MAKING SOUNDS THROUGH BULL HORNS.
Carriage Discreteness rested on a combination of the human being and the machine, which incorporated essential parameters of that artistic practice made manifest in John Cage’s chance compositions. Rainer wrote that Cage spent a lot of time explaining to the members of the Judson Dance Theater the
 Quotation from the Carriage Discreteness program, New York, 1966.
 Yvonne Rainer, “Flashback,” in Work, 1961–1973 (Halifax: Press of the Nova Scotia College of Art and Design; New York: New York University Press, 1974), 305.
 Yvonne Rainer, “An Imperfect Reminiscence of My Studies and the Beginning of a Career and Contingent Events,” in Work, 5.