Editing Codeshare agreement (section)

==History==
In 1967, [[Richard A. Henson]]’s Hagerstown Commuter airline joined with [[US Airways]] predecessor, regional [[Allegheny Airlines]], in the nation's first codeshare relationship.<ref>{{cite web | url=http://atwonline.com/aircraftenginescomponents/article/piedmonts-roots-run-deep-0309 | title=Piedmont's Roots Run Deep | access-date=2010-09-09 | archive-date=2011-07-21 | archive-url=https://web.archive.org/web/20110721101202/http://atwonline.com/aircraftenginescomponents/article/piedmonts-roots-run-deep-0309 | url-status=dead }}</ref> The term "code sharing" or "codeshare" was coined in 1989 by [[Qantas]] and [[American Airlines]],<ref>''Financial Review'', November 21, 1989</ref> and in 1990 the two firms provided their first codeshare flights between an array of Australian and U.S. cities. Code sharing has become widespread in the airline industry since then, particularly in the wake of the formation of large [[airline alliance]]s. These alliances have extensive codesharing and networked [[frequent flyer programs]].