Modern World History
Did you know that 200 years ago, the only way
one person could send a message to another person was by letter or messenger? With
our smartphones and computers at our fingertips, it's hard to imagine now. From
the invention of the telegraph in the 1830s to the wearable technology of the
present day, this ebook charts the incredible history of telecommunications.
The Passcode for the ebook is student.