EDSAC is the first computer to use Stored Program Concept.
The idea was introduced in the late 1940s by John von Neumann, who proposed that a program be electronically stored in binary-number format in a memory device so that instructions could be modified by the computer as determined by intermediate computational results.
The Electronic delay storage automatic calculator (EDSAC) was an early British computer. Inspired by John von Neumann's seminal First Draft of a Report on the EDVAC, the machine was constructed by Maurice Wilkes and his team at the University of Cambridge Mathematical Laboratory in England.
The stored program concept means that data and instructions are both logically the same and can both be stored in memory. The von Neumann architecture is built around this principle. It is important because the human does not have to execute instruction from without the machine.It was the first stored-program computer in the U.S. ETL Mark III, which began development in 1954 and was completed in 1956, was the first stored-program transistor computer. It was created by Japan's Electrotechnical Laboratory.