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1514
The Printing Press was used.
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The Fax Machine was invented.
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Ballpoint pen was used.
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The Chalkboard was used in schools.
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The Film Projector was used in schools.
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The Overhead Projector was used.
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The Computer was invented.
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The Internet was appeared.
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The Hand-held Calculator was used.
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CD/DVD was used.
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The Smart Board was used.
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The Interactive Whiteboard was used.
