However, the first general-purpose electronic computer, known as the ENIAC (Electronic Numerical Integrator and Computer), was built at the University of Pennsylvania in the United States in 1945. The ENIAC was designed to perform complex calculations for military purposes, such as computing ballistic trajectories.
The development of the computer was a collaborative effort, with contributions from many scientists and researchers in the United States and around the world. Some other notable early computers include the UNIVAC (Universal Automatic Computer) and the EDVAC (Electronic Discrete Variable Automatic Computer), both of which were also built in the United States in the 1940 s.