The Boeing B-29 is the most technologically advanced airplane during World War Two. It was the first heavy bomber to have a pressurized cabin, first to have a computerized, remote control, fire control system, and one of the first uses of computers on an airplane. The B-29's features included remote control guns, pressurized crew areas connected by a long tube over the bomb bays, and a separate pressurized area for the tail gunner that could only be left during unpressurized flight. The B-29 used the high-speed Boeing 117 airfoil, and its larger Fowler flaps added to the wing area as they increased lift.