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・ voice over ip
・ voice recognition
・ voice-net
・ voip
・ volatile
・ volatile memory
・ volatile storage
・ volatile variable
・ voltage
・ volume table of contents
von neumann architecture
・ von neumann integer
・ von neumann machine
・ von neumann ordinal
・ von neumann, john
・ voodoo programming
・ voronoi diagram
・ voronoi polygon
・ vos
・ voters telecommunications watch


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von neumann architecture : FOLDOC
von Neumann architecture
A computer architecture conceived by mathematician John von Neumann, which forms the core of nearly every computer system in use today (regardless of size). In contrast to a Turing machine, a von Neumann machine has a random-access memory (RAM) which means that each successive operation can read or write any memory location, independent of the location accessed by the previous operation.
A von Neumann machine also has a central processing unit (CPU) with one or more registers that hold data that are being operated on. The CPU has a set of built-in operations (its instruction set) that is far richer than with the Turing machine, e.g. adding two binary integers, or branching to another part of a program if the binary integer in some register is equal to zero ({conditional branch}).
The CPU can interpret the contents of memory either as instructions or as data according to the fetch-execute cycle


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