Editing Packet switching (section)

====SITA Data Transport Network====
[[SITA (IT company)|SITA]] is a consortium of airlines. Its Data Transport Network adopted X.25 in 1981, becoming the world's most extensive packet-switching network.<ref name="history">{{cite web |title=SITA History |url=http://www.sita.aero/about-sita/what-we-do/sita-history |url-status=live |archive-url=https://web.archive.org/web/20120819091302/http://www.sita.aero/about-sita/what-we-do/sita-history |archive-date=19 August 2012 |accessdate=16 August 2012 |work=About SITA > What we do |publisher=SITA}}</ref><ref name=":11">{{Cite journal |last=Rybczynski |first=Tony |date=2009 |title=Commercialization of packet switching (1975–1985): A Canadian perspective [History of Communications] |journal=IEEE Communications Magazine |volume=47 |issue=12 |pages=26–31 |doi=10.1109/MCOM.2009.5350364 |s2cid=23243636}}</ref><ref>{{Cite web |title=Airline Control System |website=[[IBM]] |url=https://www.ibm.com/downloads/cas/OEYR6Y0X}}</ref> As with many non-academic networks, very little has been published about it.