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The elograph, which was invented in 1971, was the basis of what device?

Question 1:

The elograph, which was invented in 1971, was the basis of what device?

A. The computer monitor

B. The polygraph (lie detector)

C. Touch screen technology

D. The World-Wide Web

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Trivial Practice Quiz history - Test 78 | Englishfreetest.com

30 minutes
15 questions