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Search Results for “Switching systems (communications)”
 
 
1) telephone. The Columbia Encyclopedia, Sixth Edition. 2001
...The telephones now in general use evolved from the device invented by Alexander Graham Bell and patented by him in 1876 and 1877. Although Bell is recognized as the...

2) Anderson, Philip Warren. The Columbia Encyclopedia, Sixth Edition. 2001
...Philip Warren, 1923-, American physicist, b. Indianapolis, Ind., Ph.D. Harvard, 1949. After graduation he worked at Bell Laboratories; in 1975 he became a professor...

3) cellular telephone. The Columbia Encyclopedia, Sixth Edition. 2001
...The geographic region served by a cellular system is subdivided into areas called cells. Each cell has a central base station and two sets of assigned transmission...

4) hysteresis. The Columbia Encyclopedia, Sixth Edition. 2001
...Expressed mathematically, the response to the external influence is a doubled-valued function; one value applies when the influence is increasing, the other applies...

5) computer. The Columbia Encyclopedia, Sixth Edition. 2001
...Computers developed along two separate engineering paths, producing two distinct types of computer-analog and digital. An analog computer operates on continuously...

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