Computer
A current and standard computer is compouned of a keyboard, a mouse, a screen and a central unit.
The first programmable computer, the Mar1 of IBM has been created in 1937. It was then much more complex than the ones that we currently use today, measured 17 m long, 2,5 m high, and had required 800 km of electrical wires.
The ENIAC is the one that has been used per the Manhattan project to create the H bomb. It has been built in 1943, was 1500 m² wide and was programmable manually via commutators and wires to plug.