TIL from Hacker News: ATM Infrastructure

I have been formulating a goal in my mind to really understand (not invest in) how currencies (both hard and digital) work. I loved this article because it really goes down to the earliest systems that these ATMs and other modern payment systems are built upon. This post had a similar feeling to when I read “Tubes: A Journey to the Center of the Internet” by Andrew Blum. You really get to understand how the digital bits are routed in this book, and this article does the same for ATM transactions.