ENIAC (Electronic Numerical Integrator And Computer) was the first electronic general-purpose computer. It was Turing-complete, digital, and capable of being reprogrammed to solve a full range of computing problems. ENIAC's design and construction was financed by the United States Army during World War II. The construction contract was signed in 1943, and work on the computer began in secret by the University of Pennsylvania's Moore School of Electrical Engineering starting the following month under the code name "Project PX" and was completed in 1946. It cost $400,000, used 18,000 radio tubes, and was housed in a 30-foot-by-50-foot room.