Editing Cairo (operating system) (section)

{{Short description|Codename for a Microsoft software project}}
{{Use mdy dates|date=September 2024}}
{{Distinguish|Microsoft Chicago}}
{{Infobox OS
| name = Microsoft Cairo
| developer = Microsoft
| working state = Historical
| RTM date = Cancelled
| screenshot = Microsoft-Cairo-4.0.1175.1-Logon.png
| caption = Cairo Server login screen, based on Windows NT 4.0 Server (1175.1)
}}
'''Cairo''' was the codename for a project at [[Microsoft]] from 1991 to 1996. Its charter was to build technologies for a next-generation [[operating system]] that would fulfill [[Bill Gates]]'s vision of "information at your fingertips."<ref name="FingerTips">{{cite web |url=http://ourworld.compuserve.com/homepages/r_harvey/iayf2005.htm |title=Information At Your Fingertips, 1994 Comdex Keynote |author=Bill Gates |author-link=Bill Gates |date=1994-11-14 |access-date=2008-01-02 |archive-url=https://web.archive.org/web/20071110171339/http://ourworld.compuserve.com/homepages/r_harvey/iayf2005.htm |archive-date=2007-11-10 |url-status=dead}}</ref> Cairo never shipped, although portions of its technologies have since appeared in other products.