Bingo began with paper cards, where players marked numbers by hand. The shift...

https://charlottessuperjournals.tearosediner.net/why-do-developers-keep-the-bingo-card-look-even-when-it-s-not-needed

Bingo began with paper cards, where players marked numbers by hand. The shift to digital brought auto-dabbers, making it easier to keep up with fast 90-ball games (1-90)