>>my first code ran on punched cards

You're not entirely alone, but there aren't many of us:
-For the IBM 1401 I wrote the one-card load program that loaded the program card deck and executed the program deck's first instruction. It took almost a week to write the smallest production program I ever wrote - 80 hollerith characters - and it ran for several years
-Supernerd Duke Rounds and I wrote what IBM called TOS (Tape Operating System - the precursor of DOS - Disk storage been invented yet) that loaded IBM 7070 program card images from mag tape and executed the first instruction.



>One feels old if you're in a roomful of people who work with computers and you're the *only* knows about toggling in bootstrap code into a computer. Or if you're the only one in the room that knows Hollerith code. Once got off on a good start with one of my college professors (back in the late 1980s) -- I was one of the few students noticed that he had MITS Altair 8800 sitting in his office. I did demonstrate my full nerd status at university by not only owning a slide rule, but knowing how to use it. One of these days I'm gonna have to get a "soroban" (Japanese abacus) and read up on its usage.

- I still know how to calculate a square root on paper :).
- I own a ZX Spectrum with a 5-digit serial number.
- I coded forms in Cobol using escape sequences for VT-100 and VT-52
- I actually know what VT-100 and VT-52 are :)
- my first code ran on punched cards