[dghughes]

The casino type shuffler have cameras to read the cards and remember the order of the cards after shuffling them. It also has a pseudorandom number generator it uses as a guide to shuffling randomly. You need to set the card type before loading too. Casinos order their own cards so you need to make sure the shuffler can read them.

At casinos there's so many proprietary devices for example a small plastic block like a prism the size of a quarter. It sits on the table in the area where the dealer sets his cards. Blackjack dealers use it to view their cards when face down only they can see the image. Just that little stupid plastic block is patented and costs something like $10 per device per day for every casino that leases them.