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Friday, July 22, 2011

What is Stored Program Concept in Computer Science ?

The Stored Program Concept Or  von Neumann architecture is a design model for a stored-program digital computer that uses a central processing unit (CPU) and a single separate storage structure ("memory") to hold both instructions and data. It is named after the mathematician and early computer scientist John von Neumann.

The earliest computing machines had fixed programs. Some very simple computers still use this design, either for simplicity or training purposes. For example, a desk calculator (in principle) is a fixed program computer. It can do basic mathematics, but it cannot be used as a word processor or a gaming console.The idea of the stored-program computer changed all that: a computer that by design includes an instruction set and can store in memory a set of instructions (a program) that details the computation.

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