Airliners are aircrafts that typically carry passengers and air cargo in commercial services. An airliner is usually operated by an airline company. Airline services emerged in the late 1910s, after World War I. Early airliners were typically bomber planes converted to carry people and were constructed out of mostly wood and fabric. In the 1930s, specially made airliners such as the Boeing 247, Douglas DC-2, and the Douglas DC-3 changed the views of air travel. They proved that air travel can be safe and convenient. Physical characteristics of modern airliners include oval windows, overhead storage bins, aircraft skin made up of mostly aluminum, turbo fans, and winglets. The various types of airliners include wide-body airliners, narrow-body airliners, regional airliners, and commuter-liners.
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