Nokia Bell Labs, originally named Bell Telephone Laboratories (1925–1984), then AT&T Bell Laboratories (1984–1996) and Bell Labs Innovations (1996–2007), is an American industrial research and scientific development company owned by multinational company Nokia.With headquarters located in Murray Hill, New Jersey, the company operates several laboratories in …

A transistor is a semiconductor device with at least three terminals for connection to an electric circuit.In the common case, the third terminal controls the flow of current between the other two terminals. This can be used for amplification, as in the case of a radio receiver, or for rapid switching, as in the case of digital circuits.The transistor replaced the vacuum-tube triode, also ...

Dennis MacAlistair Ritchie (September 9, 1941 – c. October 12, 2011) was an American computer scientist. He is most well-known for creating the C programming language and, with long-time colleague Ken Thompson, the Unix operating system and B programming language. Ritchie and Thompson were awarded the Turing Award from the ACM in 1983, the Hamming Medal from …

Nokia Bell Labs — Bell Telephone Laboratories ou AT&T Bell Laboratories —, plus connus sous l'appellation de Bell Labs, ou Les Bell Labs), furent fondés en 1925 et implantés à Murray Hill dans l'État américain du New Jersey.En 2009, ils font partie du centre de recherche et développement d'Alcatel-Lucent racheté en 2016 par Nokia.. Les Laboratoires Bell ont …

The Bell Homestead National Historic Site, located in Brantford, Ontario, Canada, also known by the name of its principal structure, Melville House, was the first North American home of Professor Alexander Melville Bell and his family, including his last surviving son, scientist Alexander Graham Bell.The younger Bell conducted his earliest experiments in North America …

Alexander Graham Bell (/ ˈ ɡ r eɪ. ə m /, born Alexander Bell; March 3, 1847 – August 2, 1922) was a Scottish-born inventor, scientist and engineer who is credited with patenting the first practical telephone.He also co-founded the American Telephone and Telegraph Company (AT&T) in 1885.. Bell's father, grandfather, and brother had all been associated with work on elocution …

In software engineering, version control (also known as revision control, source control, or source code management) is a class of systems responsible for managing changes to computer programs, documents, large web sites, or other collections of information.Version control is a component of software configuration management.. Changes are usually identified by a …

The history of AT&T dates back to the invention of the telephone.The Bell Telephone Company was established in 1877 by Alexander Graham Bell, who obtained the first US patent for the telephone, and his father-in-law, Gardiner Greene Hubbard.Bell and Hubbard also established American Telephone and Telegraph Company in 1885, which acquired the Bell Telephone …

At Bell Labs, William Shockley and A. Holden started investigating solid-state amplifiers in 1938. The first p–n junction in silicon was observed by Russell Ohl about 1941 when a specimen was found to be light-sensitive, with a sharp boundary between p-type impurity at one end and n-type at the other. A slice cut from the specimen at the p ...

The landmark event establishing the discipline of information theory and bringing it to immediate worldwide attention was the publication of Claude E. Shannon's classic paper "A Mathematical Theory of Communication" in the Bell System Technical Journal in July and October 1948.. Prior to this paper, limited information-theoretic ideas had been developed at Bell Labs, all implicitly …