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What charge card, developed in 1950, was the first to be accepted nationally in the US?

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What charge card, developed in 1950, was the first to be accepted nationally in the US? Answer: Diner's Club

The card was invented by Frank McNamara and Ralph Schneider.

Question context

This question is part of 📚 General Knowledge within the broader 🌐 Current Affairs & GK subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.