Hollerith cards and tape-in tape-out. Writing Assembler code to create things that don't exist yet. And when P0 came along , man what a relief.
I took the company, that I still work for, from having two stand-alone 8088s to the seventh-generation network of P4s they are running today.
You got me -- I started on mainframes with BAL and didn't get into the smaller systems until we have Z80 processors (I know, I was spoiled).
I hate computers.
The first coding I ever did was in assembly language on an IBM 1620.