I remember when I was a kid, my dad would get mail from the bank with punch cards. Checks? Invoices? Bank statements? No idea what they were, but I was fascinat

I remember when I was a kid, my dad would get mail from the bank with punch cards. Checks? Invoices? Bank statements? No idea what they were, but I was fascinated by them. I'm pretty sure he did a lot of work with punch cards himself, although pretty soon we had a printer terminal with keyboard calling his work mainframe over an acoustic modem. We played games on that thing and wasted tons of paper. No idea what the phone bill looked like.