What were punch cards and how did they change business?

P H Grinyer MBCS shares his memories of punch cards, their uses, evolution and a family celebration.

1937 IBM International business machines Punch card vintage ad

Voting machines have transitioned from punch cards to scanning tech, but problems persist - The Hustle

Punch Cards Chore Chart System Punch cards, Kids punch, Kids rewards

Punch cards enter business vernacular - WiredPen

Digi Punch Card - digital punch card for businesses

Punched Cards - CHM Revolution

The End of Punch Cards - Dave Margulius On Climate

How paper punch cards enabled the rise of computing, and shaped humanity.

Koyal Wholesale Vintage Kraft Brown Reward Punch Cards, Loyalty Cards for Small Business Customers, 100-Pack

History

102 PCS Punch Cards, Incentive Reward Card Student Awards Loyalty Cards for Business, Classroom, Kids Behavior, Students, Teachers, 3.5” x 2”, 4 Styles

PUNCHED CARD EQUIPMENTSbase of initial data processing for industrial appliactions