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User Requirements and EDP
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applications packages applications software approach automation batch cent central chip circuit COBOL common carrier complex components computer system configuration conversion cost data base management data base systems data communications data entry data processing DATAPAC device disk distributed data system distributed system economics economy of scale EDP system efficiency electronic end user environment equipment error error correction codes existing failsoft FORTRAN functions gates hardware host implementation improved increased information system integrated interactive interface labor logic mass storage megabytes microprocessor microprogramming million minicomputers module MTBF multiprocessor network processor operating system organization packet switching performance problem programming recovery reduced redundancy requirements scale computer semiconductor shown in Figure specific speed standard substantially subsystems switching system design system failure system reliability system selection system software techniques telephone trend typical video terminals voice response