ATM's are the OG distributed system. If you ever get a online banking notice about your bank doing maintenance over the weekend usually they ATM's will go into

ATM's are the OG distributed system. If you ever get a online banking notice about your bank doing maintenance over the weekend usually they ATM's will go into standby mode. When this happens it is really interesting, and a fun source of chaos. The ATM's in standby mode allow you to withdraw on credit, the limit of your card. Even if you have no money. It all starts to get reconciled over the next week and you have to pay it all back. But it's a 2am bear trap for drunk people at casinos.