Get new Wikipedia articles popular on Hacker News - one email per week.
No spam. Unsubscribe anytime. · Privacy
A lace card (also called a whoopee card, ventilator card, flyswatter card, or IBM doily) is a punched card with all holes punched. They were mainly used as practical jokes to cause disruption in card readers. Card readers tended to jam when a lace card was inserted, as the…
A lace card (also called a whoopee card, ventilator card, flyswatter card, or IBM doily) is a punched card with all holes punched. They were mainly used as practical jokes to cause disruption in card readers. Card readers tended to jam when a lace card was inserted, as the…
Get new Wikipedia articles popular on Hacker News - one email per week.
No spam. Unsubscribe anytime. · Privacy