First generation

With ENIAC starts first generation computers which lasted until 1959. A lack of computers of this generation was heating electronic lamps, which requireadditional cooling. The speed of these computers was around 20 000 operations per second, they had limited memory and data memory used perforated paper card. At that time John von Neumann gave the idea to remember not only the data but also programs. This idea is realized in the EDSAC computer in 1949, which was made ​​at the University of Cambridge in England.