>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