TRADIC (for TRAnsistor DIgital Computer or TRansistorized Airborne DIgital Computer), the first transistorized computer in the USA, completed in 1954. The computer was built by Jean Howard Felker "(visible at left)" at Bell Labs for the United States Air Force, intended as a prototype for aircraft navigation and bomb targeting computers. Alterations to image: a small piece is torn out of the paper original along lower left edge.