INST 201 Lecture Notes - Lecture 2: Johannes Gutenberg, Printing, Telecommunications Network
1 Feb 2018
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Document Summary
Information and communication technologies are a diverse set of technological tools and resources used to communicate information . Only rich people and religious folk were literate. Books were scare because everything was handwritten. Introduced movable type to speed up book printing. Considered the most important technological innovation of the last few centuries. One of the key factors in the enlightenment. Travel times during the mid 1800s was very slow . With the birth of the railroad, telegraph lines spread across the country. Alexander graham bell credited for invention (1876) Within 3 years, 50,000 telephones in the country. In 1915, telephone lines were laid across the atlantic so people could now communicate on different continents. Metcalf"s law: states that the value of a telecommunications network is proportional to the square of the number of connected users of the system (n 2 ). Connected rural families to the outside world. People could now move to the cities.
