Programmable matter was a substance used in the 32nd century. Consisting of minute nanomolecules, the matter had the abilities of redistributing and redesigning itself into pre-programmed shapes.
Capable of reading bio-signs, the programmable matter was highly adaptive to an user. It learned and adjusted to the user's reflexes, creating interface styles that were unique to each individual. (DIS: "Scavengers")
Programmable matter was used to attach Discovery's detached warp nacelles when reconnected to the ship (DIS: "Scavengers") and when an explosion disrupted the fields holding the starboard warp nacelle in place, the matter reacted automatically to bridge the gap and physically pull the nacelle back to the ship. (DIS: "That Hope Is You, Part 2")