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

https://station-wiki.win/index.php/Why_Is_Online_Bingo_More_Flexible_Than_Going_to_a_Hall%3F

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)