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)
• All pages with titles beginning with 1.1