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The tag usually refers to questions about predictions that are made in Sci-Fi, whether technological or historical, that have come true or not.
30
votes
What sci-fi work introduced handheld wireless communicators?
If you are willing to stretch what might be considered SciFi:
Tik-Tok of Oz by L. Frank Baum published in 1914.
"Very well," said the Wizard, and without any fuss or mystery whatever he performed a m …