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

https://star-wiki.win/index.php/How_Did_Bingo_Halls_Become_Community_Spaces_in_the_20th_Century%3F

Bingo started with paper cards, where players marked numbers by hand. With digital play, auto-dabbers do the marking for you, making 90-ball games smoother and faster