General Knowledge MCQs – Practice Test 17 (Chapter 14)
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MCQ 81: Penicillin was accidentally discovered in
MCQ 82: The 'QWERTY' design type writers and computers keyboards is invented by
MCQ 83: The Rotary Printing Press was invented by
MCQ 84: Vapor compression refrigeration machine was invented by Oliver Evans in
MCQ 85: First personal computer controlled with a keyboard was invented by
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