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Pager. A pager, also known as a beeper or bleeper, [1] is a wireless telecommunications device that receives and displays alphanumeric or voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknowledge, reply to, and originate messages using an internal transmitter. [2]
The September 11 Digital Archive is a digital archive that stores information relating to the September 11 attacks on the United States in 2001. It contains over 150,000 digital files including images, videos, audio, and over 40,000 first-hand accounts of the attacks. It is part of the collection of the Library of Congress.
Al Gross (engineer) Irving " Al " Gross (/ ɡroʊs /; February 22, 1918 – December 21, 2000) was a pioneer in mobile wireless communication. He created and patented many communications devices, specifically in relation to an early version of the walkie-talkie, [1] Citizens' Band radio, [2] the telephone pager [2] and the cordless telephone.
a Boston University (see below). b See below. c Two died soon after birth. Alexander Graham Bell (/ ˈɡreɪ.əm /, born Alexander Bell; March 3, 1847 – August 2, 1922) [4] was a Scottish-born [N 1] Canadian-American inventor, scientist, and engineer who is credited with patenting the first practical telephone.
1878: First phone directory printed in Connecticut. Telegraph manager George Coy of New Haven, Connecticut, developed an exchange—the system that allows people to call each other—within a year ...
As it expanded, the company was first renamed Connecticut Telephone, and then Southern New England Telephone in 1882. [21] The site of the first telephone exchange was granted a designation as a National Historic Landmark on 23 April 1965. However it was withdrawn in 1973 in order to demolish the building and construct a parking garage.
Johann Philipp Reis. Johann Philipp Reis (German: [ʁaɪs]; 7 January 1834 – 14 January 1874) was a self-taught German scientist and inventor. In 1861, he constructed the first make-and-break telephone, today called the Reis telephone. It was the first device to transmit a voice via electronic signals and for that the first modern telephone ...
Elisha Gray (August 2, 1835 – January 21, 1901) was an American electrical engineer who co-founded the Western Electric Manufacturing Company. Gray is best known for his development of a telephone prototype in 1876 in Highland Park, Illinois.