History of the PC “If one thinks about it, it is truly remarkable how far the technology has advanced since the first digital computer was introduced in 1946. The ENIAC (Electronic Numerical Integrator and Calculator) was designed and built at the University of Pennsylvania. It weighed 30-tons and took up 1500 square feet of floor space. The first computer developed in Europe was the EDSAC (Electronic Delay-Storage Automatic Computer). This machine was built at Cambridge University in 1949.