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Logica
Logica plc was a Multinational corporation, multinational information technology, IT and Management consulting, management consultancy company headquartered in London and later Reading, Berkshire, Reading, United Kingdom. Founded in 1969, the company had offices in London and in a number of major cities across England, Wales and Scotland, as well as in other countries around the world. It was responsible for many telecommunications infrastructure projects, such as the design of the SWIFT network for international money transfers, the Packet switching#Euronet, Euronet packet-switching network, and the Bay Area Rapid Transit in San Francisco. Following the acquisition of CMG (company), CMG in 2002, the company was known as LogicaCMG from then until 2008, when it changed its name back to Logica. The company's main business at that point was in providing consulting, systems integration, and IT outsourcing in both the public and private sectors. Logica was acquired by Canada-base ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CMG (company)
CMG (Computer Management Group) was a Consultant, consulting company focused on telecommunications and computing and based in London, United Kingdom. It was once a constituent of the FTSE 100 Index until it merged with Logica in 2002. History The company was founded in 1964 by Bob Collins, Bryan Mills and Chairman Doug Gorman – the first letters of their surnames forming the original company name. In fact, Bob Collins never actually commenced with the company, his place being taken by Bob Fawcett. CMG started trading in August 1965, when Bryan Mills and Bob Fawcett gave up their jobs (with Burroughs Corporation, Burroughs and Honeywell respectively) and started working out of their homes. By late 1965 they had moved into the basement of Doug Gorman's house in Blackheath, London, Blackheath, South East London. Doug had also left his job and was working full-time for the company having worked out his 3 months notice at PriceWaterhouseCoopers, Cooper Bros. One of the earliest emp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CGI Group
CGI Inc. (Consultants to Government and Industry Incorporated) is a Canadian multinational information technology consulting and Software Development company headquartered in Montreal, Quebec, Canada. CGI went public in 1986 with a primary listing on the Toronto Stock Exchange. CGI is also a constituent of the S&P/TSX 60 and has a secondary listing on the New York Stock Exchange. As of 2024, CGI is based in 40+ countries with around 400 offices worldwide with 95,000+ employees. CGI mainly works in application services, business consulting, business process Management, IT infrastructure services, IT outsourcing services, and systems integration services. History 1970s-1980s: Early years CGI Inc. was founded as an IT consulting company on June 15, 1976, in Quebec City, Québec, by Serge Godin. Within several months he was joined by co-founder André Imbeau from Quebec City. They initially ran the business from Godin's basement with a single phone. Starting with one clien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packet Switching
In telecommunications, packet switching is a method of grouping Data (computing), data into short messages in fixed format, i.e. ''network packet, packets,'' that are transmitted over a digital Telecommunications network, network. Packets consist of a header (computing), header and a payload (computing), payload. Data in the header is used by networking hardware to direct the packet to its destination, where the payload is extracted and used by an operating system, application software, or Protocol stack, higher layer protocols. Packet switching is the primary basis for data communications in computer networks worldwide. During the early 1960s, American engineer Paul Baran developed a concept he called ''distributed adaptive message block switching'', with the goal of providing a fault-tolerant, efficient routing method for telecommunication messages as part of a research program at the RAND Corporation, funded by the United States Department of Defense. His ideas contradicted t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Informatics Network
In telecommunications, packet switching is a method of grouping data into short messages in fixed format, i.e. '' packets,'' that are transmitted over a digital network. Packets consist of a header and a payload. Data in the header is used by networking hardware to direct the packet to its destination, where the payload is extracted and used by an operating system, application software, or higher layer protocols. Packet switching is the primary basis for data communications in computer networks worldwide. During the early 1960s, American engineer Paul Baran developed a concept he called ''distributed adaptive message block switching'', with the goal of providing a fault-tolerant, efficient routing method for telecommunication messages as part of a research program at the RAND Corporation, funded by the United States Department of Defense. His ideas contradicted then-established principles of pre-allocation of network bandwidth, exemplified by the development of telecomm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roger Scantlebury
Roger Anthony Scantlebury (born August 1936) is a British computer scientist and Internet pioneer who worked at the National Physical Laboratory (NPL) and later at Logica. Scantlebury led the pioneering work to implement packet switching and associated communication protocols at the NPL in the late 1960s. He proposed the use of the technology in the ARPANET, the forerunner of the Internet, at the inaugural Symposium on Operating Systems Principles in 1967. During the 1970s, he was a major figure in the International Network Working Group through which he was an early contributor to concepts used in the Transmission Control Program which became part of the Internet protocol suite. Early life Roger Scantlebury was born in Ealing in 1936. Career National Physical Laboratory Scantlebury worked at the National Physical Laboratory in south-west London, in collaboration with the National Research Development Corporation (NRDC). His early work was on the Automatic Computing Engine a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packet Switching
In telecommunications, packet switching is a method of grouping Data (computing), data into short messages in fixed format, i.e. ''network packet, packets,'' that are transmitted over a digital Telecommunications network, network. Packets consist of a header (computing), header and a payload (computing), payload. Data in the header is used by networking hardware to direct the packet to its destination, where the payload is extracted and used by an operating system, application software, or Protocol stack, higher layer protocols. Packet switching is the primary basis for data communications in computer networks worldwide. During the early 1960s, American engineer Paul Baran developed a concept he called ''distributed adaptive message block switching'', with the goal of providing a fault-tolerant, efficient routing method for telecommunication messages as part of a research program at the RAND Corporation, funded by the United States Department of Defense. His ideas contradicted t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reading, Berkshire
Reading ( ) is a town and borough in Berkshire, England, and the county town of Berkshire. It is the United Kingdom's largest town, with a combined population of 355,596. Most of Reading built-up area, its built-up area lies within the Borough of Reading, although some outer suburbs are parts of neighbouring local authority areas. It is located in the Thames Valley at the confluence of the rivers River Thames, Thames and River Kennet, Kennet. Reading is a major commercial centre, especially for information technology and insurance. It is also a regional retail centre, serving a large area of the Thames Valley with its shopping centres, including The Oracle, Reading, the Oracle, the Broad Street Mall, and the pedestrianised area around Broad Street. It is home to the University of Reading. Every year it hosts the Reading and Leeds Festivals, Reading Festival, one of England's biggest music festivals. Reading has a professional association football team, Reading F.C., and partici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Datagram
A datagram is a basic transfer unit associated with a packet-switched network. Datagrams are typically structured in header and payload sections. Datagrams provide a connectionless communication service across a packet-switched network. The delivery, arrival time, and order of arrival of datagrams need not be guaranteed by the network. History In the early 1970s, the term ''datagram'' was created by combining the words ''data'' and ''telegram'' by the CCITT rapporteur on packet switching, Halvor Bothner-By. While the word was new, the concept had already a long history. In 1964, Paul Baran described, in a RAND Corporation report, a hypothetical military network having to resist a nuclear attack. Small standardized ''message blocks'', bearing source and destination addresses, were stored and forwarded in computer nodes of a highly redundant meshed computer network. Baran wrote: "The network user who has called up a ''virtual connection'' to an end station and has trans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virtual Circuit
A virtual circuit (VC) is a means of transporting data over a data network, based on packet switching and in which a connection is first established across the network between two endpoints. The network, rather than having a fixed data rate reservation per connection as in circuit switching, takes advantage of the statistical multiplexing on its transmission links, an intrinsic feature of packet switching. A 1978 standardization of virtual circuits by the CCITT imposes per-connection Flow control (data), flow controls at all user-to-network and network-to-network interfaces. This permits participation in congestion control and reduces the likelihood of packet loss in a heavily loaded network. Some circuit protocols provide Reliability (computer networking), reliable communication service through the use of data retransmissions invoked by error detection and automatic repeat request (ARQ). Before a virtual circuit may be used, it must be established between network nodes in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARPANET
The Advanced Research Projects Agency Network (ARPANET) was the first wide-area packet-switched network with distributed control and one of the first computer networks to implement the TCP/IP protocol suite. Both technologies became the technical foundation of the Internet. The ARPANET was established by the Advanced Research Projects Agency (now DARPA) of the United States Department of Defense. Building on the ideas of J. C. R. Licklider, Robert Taylor (computer scientist), Bob Taylor initiated the ARPANET project in 1966 to enable resource sharing between remote computers. Taylor appointed Lawrence Roberts (scientist), Larry Roberts as program manager. Roberts made the key decisions about the request for proposal to build the network. He incorporated Donald Davies' concepts and designs for packet switching, and sought input from Paul Baran on dynamic routing. In 1969, ARPA awarded the contract to build the Interface Message Processors (IMPs) for the network to Bolt Berane ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NPL Network
The NPL network, or NPL Data Communications Network, was a local area computer network operated by the National Physical Laboratory (United Kingdom), National Physical Laboratory (NPL) in London that pioneered the concept of packet switching. Based on designs conceived by Donald Davies in 1965, development work began in 1966. Construction began in 1968 and elements of the first version of the network, the Mark I, became operational in early 1969 then fully operational in January 1970. The Mark II version operated from 1973 until 1986. The NPL network was the first computer network to implement packet switching and the first to use high-speed links. Its original design, along with the innovations implemented in the ARPANET and the CYCLADES network, laid down the technical foundations of the modern Internet. Origins In 1965, Donald Davies, who was later appointed to head of the NPL Division of Computer Science, proposed a commercial national data network in the United Kingdom b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolt, Beranek And Newman
Raytheon BBN (originally Bolt, Beranek and Newman, Inc.) is an American research and development company based in Cambridge, Massachusetts. In 1966, the Franklin Institute awarded the firm the Frank P. Brown Medal, in 1999 BBN received the IEEE Corporate Innovation Recognition, and on 1 February 2013, BBN was awarded the National Medal of Technology and Innovation, the highest honors that the U.S. government bestows upon scientists, engineers and inventors, by President Barack Obama. It became a wholly owned subsidiary of Raytheon in 2009. History BBN has its roots in an initial partnership formed on 15 October 1948 between Leo Beranek and Richard Bolt, professors at the Massachusetts Institute of Technology. Bolt had won a commission to be an acoustic consultant for the new United Nations permanent headquarters to be built in New York City. Realizing the magnitude of the project at hand, Bolt had pulled in his MIT colleague Beranek for help and the partnership betwee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
