Blast from the past from an old programmer. Back in the day people were amazed that I could read a punched card that did not have any verbiage above.
I write my pins on the back of my debit cards in binary with a bit shift. It helps keep me centered.
Tch, tch! Please, ours is a technical profession, proper terminology at all times! Hollerith or IBM Card unless you were one of the Remington Rand unwashed! Still have nightmares of a spilled box of the same!
Boy, does that bring back memories.
Where I went to school, you could pick out the computer science majors; they all had a half dozen rubber bands around their wrists. The engineering majors had a slide rule in a holster on their hips. (The math majors were all off in their own world somewhere.)