the underground railroad was a network of secret routes and safe houses used by the 1900's slaves of African descent.
Conductor- An individual who escorted slaves between "stations" or safe houses.
Station- Hiding places in safe houses
Lines- A route slaves took north to freedom
Freight- Escaped slaves
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Answer:
Transistor computers were built. The first mobile phones were built. Computers using vacuum tubes were invented. Computers with integrated circuits were invented. The World Wide Web was created.
Explanation:
