Credit - Card

: In the 1960s, IBM designers struggled to attach magnetic tape to cards until an engineer's wife suggested ironing it on , which worked and paved the way for modern swiping. A Useful Lesson: The "Freeloader" Paradox

: A few months later, he returned to that same restaurant and paid using a small cardboard card—the Diners Club card . credit card

Before McNamara's cardboard card, merchants in the 1800s and early 1900s used metal coins or "Charga-Plates" to let regular customers buy on credit locally. : In the 1960s, IBM designers struggled to