Continuous Shuffle Machine. A machine that continuously shuffles the cards and acts as the shoe as well. Discards are put into the machine after every couple of hands. They will be shuffled back into the deck in various ways, depending on the machine. Many machines use a series of slots, often 9 or 19, and randomly insert the discards into the top or bottom of a slot. A random slot is added to the deck. There are many different types of CSM's and they do not all work the same. Do not confuse this with a Automatic Shuffle Machine. There is controversy as to the actual randomness of these machines.