Bingo has gradually shifted from using paper cards to digital play, making it...

https://sierra-wiki.win/index.php/How_Did_the_Dabber_Change_from_Ink_to_Software%3F

Bingo has gradually shifted from using paper cards to digital play, making it easier and faster to enjoy 90-ball games. Auto-dabbers now mark numbers for you, so you can focus on the fun without missing a call