If you recognize these, then you're likely about as old as I am. I used them in college for a course in FORTRAN programming.
I only have about a dozen of them. I use them on a postal scale to determine whether a mailing needs an extra stamp. This was taken at Raymond & Jeanne's a few days ago. He has a whole box of them; they use them for note paper and bookmarks in cookbooks, I expect.
Retired economics professor (“dismal scientist”). Married 40+ years to the love of my life; we have two grown daughters, both married, two granddaughters and a...
Oh, I remember all right. New Mexico State had one machine, as big as a building, and all the students had to wait in line to run their cards, and if there was one mistake, start all over again. Not my favorite class.