Operating System Codenames - Random Trivia Answers

• A1) Mac OS X 10.0. Cheetah began life on March 24, 2001 and was last updated on June 22, 2001 (10.0.4). The public beta had been known as Kodiak.
• A2) Mac OS X 10.2. Jaguar was released on August 23, 2002 and was last updated on October 3, 2003 (10.2.8).
• A3) Mac OS X 10.5. Leopard hit the public on October 26, 2007 and was last updated on May 12, 2009 (10.5.7).
• A4) Mac OS X 10.3. Panther debuted on October 24, 2003 and was last updated on April 15, 2005 (10.3.9).
• A5) Mac OS X 10.1. Puma entered the world on September 25, 2001 and was last updated on June 6, 2002 (10.1.5).
• A6) Mac OS X 10.4. Tiger was launched on April 29, 2005 and was last updated on November 14, 2007 (10.4.11), the highest dot release for any version of Mac OS X.

PC

• A7) Windows NT 4.0. Cairo had previously been the name of a next-generation operating system that was being developed at Microsoft from 1991 to 1996 but never saw the light of day, at least not as a whole. The new Cairo debuted on July 29, 1996.
• A8) Windows 95. Also known as Windows 4.0, Chicago integrated MS-DOS with Windows and was released on August 25, 1995.
• A9) Windows 3.1. Janus added 32-bit support on March 18, 1992 and doomed office productivity by bundling Minesweeper.
• A10) Windows Vista. Available for volume licensing on November 30, 2006 and in retail on January 30, 2007, Longhorn was given the fake codename Mojave in an ad campaign.
• A11) Windows 98. Released on June 25, 1998, Memphis required a 486DX-2/66 MHz or better processor, 16 MB of RAM, and 500 MB of hard drive space.
• A12) Windows XP. Finished on August 24, 2001 and available in retail on October 25, 2001, Whistler remains the most popular operating system in the world, as the rejection of Windows Vista has left over three-fifths of all PC users still running XP as of May 2009.

Other codenames for major OS releases include Snow Leopard for Mac OS X 10.6 (to be released in September 2009), Georgia Millennium for Windows Me (released in September 2000), and Daytona for Windows NT 3.5 (released in September 1994).