Answer: Electronic mail
Explanation:
Electronic mail is the exchange of messages between people using electronic devices. Electronic mail predates and was also crucial to the establishment of the Internet.
Electronic mail (E-mail) started in 1965 as a way for the multiple users of a time-sharing mainframe computer to communicate and send amesages across to each other.
The name given to the loose organization of people dedicated to helping escaped slaves get to free territory was the "Under Ground Railroad." Hope this answer helped!
He was called General MacArthur
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