The earliest powered heavier-than-air aircraft, from the first controlled powered flights through the fragile wood-and-fabric designs of the First World War era, before aviation matured into distinct airliner, general aviation and military categories. Belongs here: the first successful powered aircraft and the pioneering designs of aviation's first two decades, including early combat aircraft from the First World War. Does not belong here: aircraft built once aviation had matured into recognizable modern categories, which are grouped by role instead.