The BFSS matrix model (Banks-Fischler-Shenker-Susskind 96, Seiberg 97) is the description of the worldline dynamics of interacting D0-branes. In the large N limit of a large number of D0-branes this is supposed to encode the strong coupling limit of type IIA string theory known as M-theory at least in certain corners of its moduli space. The BFSS model is a limiting case of the BMN matrix model, which improves on some of its shortcomings (see the Open problems below). The BFSS matrix model was..