1.1

1.1 may refer to:

1.1.1.1, a Domain Name System service 1.1-inch/75-caliber gun Falcon 9 v1.1 orbital launch vehicle Trabant 1.1, an automobile A one-day Category 1 race in the UCI race classifications system A software version number, including: HTTP 1.1, a version of the Hypertext Transfer Protocol first published in 1997 SAML 1.1, a version of Security Assertion Markup Language ratified in 2003

See also 11 (disambiguation) 1:1 (disambiguation) 1+1 (disambiguation)