On the History of EDVAC
In 1946, Mauchly and Eckert proposed the construction of a new fantastic machine with an automatic electronic computer together with discrete variables called (Electronic Discrete Variable Automatic Computer – EDVAC). The concept of the computer project was completed by 1946; unfortunately, several members left the project and took on other tasks. Returned to the machine in 1952, after completion of the work, EDVAC contained approximately 4,000 electron lamps and 10,000 crystal diodes. The 1956 report shows that the trouble-free EDVAC computer operation time was about 8 hours.