The Lockheed Constellation (aka “Connie”) is regarded as the first civil airliner family of aircraft to enter widespread use equipped with a pressurized cabin. It found extensive use in both military and civilian use during and after World War II (as the Super Constellation). The Constellation is sometimes regarded as an aircraft that changed the world. Previous aircraft like Pan Am’s Boeing Clipper 314s were unpressurized, while the old Zeppelins were infamously frightfully cold with passengers having to warm up (even though they were luxurious).