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'''Technology for Autonomous Operational Survivability''' ('''TAOS''') (also known as '''TAOSSpace Test Experiment Platform 0''' and ('''STEP 0''') and '''USA101''') was a [[satellite]] developed by the [[United States Air Force|US Air Force's]] Phillips Laboratory (now part of the [[United States Air Force Research Laboratory|Air Force Research Laboratory]] Space Vehicles Directorate) to test technology for autonomous operation of spacecraft.<ref>{{cite web | url=http://www.globalsecurity.org/space/systems/taos.htm | title=Technology for Autonomous Operational Survivability | accessdate=2008-08-03 | publisher=GlobalSecurity.org}}</ref><ref>{{cite web | url=http://www.astronautix.com/crafts/taosstep0taosp90-5.htmhtml | archive-url=https://web.archive.org/web/20170613131020/http://www.astronautix.com/s/step0taosp90-5.html | url-status=dead | archive-date=June 13, 2017 | title=Encyclopedia Astronautica: TAOS | accessdate=2011-08-27 | publisher=Encyclopedia Astronautica}}</ref>
The TAOS mission was operated by heritage [[Space Test and Development Wing]] and the [[1st Space Operations Squadron]].<ref>{{cite web|title=Schriever AFB Public Affairs: 1st Space Operations Squadron Fact Sheet|url=http://www.schriever.af.mil/library/factsheets/factsheet.asp?id=3912|archiveurl=https://wwwweb.webcitationarchive.org/5gkZuP4Rh?url=web/20090412042641/http://www.schriever.af.mil/library/factsheets/factsheet.asp?id=3912|archivedate=2009-0504-1312|url-status=dead|accessdate=2009-04-14}}</ref>