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For what does the world owe Almon Strowger a debt of gratitude?

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For what does the world owe Almon Strowger a debt of gratitude? Answer: Automatic Telephone Exchanges

He was an undertaker, and legend has it, he developed the automatic switch in 1889, to stop competitors from getting his work!

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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.