Bingo started with paper cards in halls, where players marked numbers by hand....

https://trentonsimpressivethoughtss.evergrovio.com/posts/what-s-the-simplest-explanation-of-picture-bingo-for-beginners

Bingo started with paper cards in halls, where players marked numbers by hand. The shift to digital brought auto-dabbers, so you no longer miss a called number, especially in 90-ball (1-90) games