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Electronic Data Processing (EDP) can refer to the use of automated methods to process commercial data. Typically, this uses relatively simple, repetitive activities to process large volumes of similar information. For example: stock updates applied to an inventory, banking transactions applied to account and customer master files, booking and ticketing transactions to an airline's reservation system, billing for utility services. The modifier "electronic" or "automatic" was used with "data processing" (DP), especially ca. 1960, to distinguish human clerical data processing from that done by computer. == History == The first commercial business computer was developed in the United Kingdom in 1951, by the J. Lyons and Co. catering organization.〔(World’s First Business Computer, LEO, Turns 60 ), TechWeek Europe〕 This was known as the 'Lyons Electronic Office' - or LEO for short. It was developed further and used widely during the 1960s and early 1970s. (Joe Lyons formed a separate company to develop the LEO computers and this subsequently merged to form English Electric Leo Marconi and then International Computers Limited.〔 〕 By the end of the 1950s punched card manufacturers, Hollerith, Powers-Samas, IBM and others, were also marketing an array of computers.〔Goldsmith J A. Choosing your Computer. The Accountant 14 June 1958.〕 Early commercial systems were installed exclusively by large organizations. These could afford to invest the time and capital necessary to purchase hardware, hire specialist staff to develop bespoke software and work through the consequent (and often unexpected) organizational and cultural changes. At first, individual organizations developed their own software, including data management utilities, themselves. Different products might also have 'one-off' bespoke software. This fragmented approach led to duplicated effort and the production of management information needed manual effort. High hardware costs and relatively slow processing speeds forced developers to use resources 'efficiently'. Data storage formats were heavily compacted, for example. A common example is the removal of the century from dates, which eventually led to the 'millennium bug'. Data input required intermediate processing via punched paper tape or punched card and separate input to a repetitive, labor-intensive task, removed from user control and error-prone. Invalid or incorrect data needed correction and resubmission with consequences for data and account reconciliation. Data storage was strictly serial on paper tape, and then later to magnetic tape: the use of data storage within readily accessible memory was not cost-effective. Significant developments took place in 1959 with IBM announcing the 1401 computer and in 1962 with ICT (International Computers & Tabulators) making delivery of the ICT 1301. Like all machines during this time the core processor together with the peripherals – magnetic tape decks, discs, drums, printers and card and paper tape input and output required considerable space in specially constructed air conditioned accommodation. Often parts of the punched card installation, in particular sorters, were retained to present the card input to the computer in a pre-sort form that reduced the processing time involved in sorting large amounts of data. Data processing facilities became available to smaller organization in the form of the computer services bureau. These offered processing of specific applications e.g. payroll and were often a prelude to the purchase of customers own computer. Organizations used these facilities for testing programs while awaiting the arrival of their own machine. These initial machines were delivered to customers with limited software. The design staff was divided into two groups. ''Systems analysts'' produced a systems specification and ''programmers'' translated the specification into machine language. Literature on computers and EDP was sparse through articles appearing in accountancy publications and material supplied by the equipment manufacturers. The first issue of The Computer Journal published by The British Computer Society appeared in mid 1958. The UK Accountancy Body now named The Association of Chartered Certified Accountants formed an Electronic Data Processing Committee in July 1958 with the purpose of informing its members of the opportunities created by the computer. The Committee produced its first booklet in 1959, An Introduction to Electronic Computers. Also in 1958 The Institute of Chartered Accountants in England and Wales produced a paper Accounting by Electronic Methods. The notes indicated what appears capable and the possible implications of using a computer. Progressive organizations attempted to go beyond the straight systems transfer from punched card equipment and unit accounting machines to the computer, to producing accounts to the trial balance stage and integrated management information systems. New procedures redesigned the way paper flowed, changed organizational structures, called for a rethink of the way information was presented to management and challenged the internal control principles adopted by the designers of accounting systems.〔Mitchell R. baba Control with a Computer. The Accountant 3 November 1962.〕 But the full realization of these benefits had to await the arrival of the next generation of computers 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Electronic data processing」の詳細全文を読む スポンサード リンク
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