The ENIAC (Electronic Numerical Integrator and Computer) was the first general-purpose electronic digital computer. Unveiled in 1946, it was Turing-complete and could be reprogrammed to solve a full range of computing problems, rather than one fixed problem. The ENIAC was huge, weighing 30 tons, using about 18,000 vacuum tubes, 70,000 resistors, 10,000 capacitors, and around 5 million hand-soldered joints.