is difficult. Shannon 1940  Notable achievements include:   EDSAC  was one of the first computers to implement the stored program ( von Neumann ) architecture. Die  of an  Intel 80486DX2 microprocessor  (actual size: 12×6.75 mm) in its packaging. Konrad Zuse 's  electromechanical  "Z machines". The  Z3  (1941) was the first working machine