A stored-program computer is one which stores program instructions in electronic memory. A Von Neumann architecture is a stored-program computer in which the program data and instruction data are stored in the same memory; a Harvard architecture is one which has separate memories for storing program and data.
Many early computers, such as the Atanasoff–Berry Computer, were not reprogrammable. They executed a single hardwired program. As there were no program instructions, no program storage was necessary. Other computers, though programmable, stored their programs on punched tape which was physically fed into the machine as needed.
The University of Manchester's Small-Scale Experimental Machine (SSEM) was the world's first stored-program computer. The Manchester Mark 1 was another early stored-program computer.
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Many early computers, such as the Atanasoff–Berry Computer, were not reprogrammable. They executed a single hardwired program. As there were no program instructions, no program storage was necessary. Other computers, though programmable, stored their programs on punched tape which was physically fed into the machine as needed.
The University of Manchester's Small-Scale Experimental Machine (SSEM) was the world's first stored-program computer. The Manchester Mark 1 was another early stored-program computer.
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