Windows XP

Windows XP is a version of Windows, numbered 5.1, that was released on August 24, 2001 to the public. It is generally considered to be a success.

Builds

 * Beta 0.5: 2250, 2257
 * Beta 1: 2296
 * Beta 2: ?
 * Beta 2 Milestone 1: ?
 * Beta 2 Milestone 2: ?
 * Beta 2 Milestone 3: ?
 * Beta 2 Milestone 4: ?
 * Beta 2.1: ?
 * Beta 3: ?
 * Beta 3.1: ?
 * Beta 3.2: ?
 * Beta 4: ?
 * Beta 4.1: 2477
 * Beta 4.2: 2479
 * Beta 5: 2480
 * Beta 5.1: 2484

SKUs

 * Professional
 * Home Edition
 * Workstation
 * Server
 * Server 2001
 * Home Server
 * (these were released on RTM day)
 * Tablet PC Edition (2002)
 * Ultimate (2002)
 * x64 Edition (2003)
 * Windows XP Freestyle (2004) (actually, this was Longhorn build 3683-3718)
 * Starter (2004)
 * Windows XP SE // Second Edition (2004)
 * Media Center Edition (2002/2003/2004/2005/2006)
 * Windows XP Slim (2006)
 * Windows XP TE // Third Edition (2007)
 * Windows XP2 (2009)
 * Windows XP Superslim (2011)
 * Windows XP End-of-Life (April 8, 2014)
 * Windows XP3 (2015)
 * Windows XP SE End-of-Life (February 15, 2017)
 * Windows XP Slim End-of-Life (April 9, 2019)
 * Windows XP TE End-of-Life (2020)
 * Windows XP4 (2021)
 * Windows XP Superslim End-of-Life (2024)
 * Windows XP5 (2027)
 * Windows XP Prime (2031)
 * Windows XP6 (2032)
 * Windows XP7 (2037)
 * Windows XP8 (2041)
 * Windows XP9 (2044)
 * Windows XP10 (2047)
 * Windows XP11 (2051)
 * Windows XP12 (2056)
 * Windows XP13 (2063)
 * Service Pack 1 (2002)
 * Service Pack 2 (2004)
 * Service Pack 3 (2008)
 * Service Pack 4 (2010)
 * Windows XP Build 3000 (3001)
 * Windows XP Build 1,664,230 (2,000,001)
 * Windows XP Build 1,225,331,634 (2,000,000,001)
 * Windows XP Build 9,531,970,911,031 (2,000,000,000,001)

NRF service packs

 * Service Pack 5 (2016)
 * Service Pack 6A (2020)
 * Service Pack 6B (2022)
 * Service Pack 6 UR1 (2023)
 * Service Pack 6 UR2 (2026)
 * Service Pack 7 (2028)
 * Service Pack 8 (2032)
 * Service Pack 9A (2037)
 * Service Pack 9A UR1 (2039)
 * Service Pack 9B (2044)
 * Service Pack 9C (2045)
 * Service Pack 10 (2050)
 * Service Pack M (2056)
 * Service Pack CZ (2180)
 * EUR Service Pack 1 (2181)
 * EUR Service Pack 2 (2184)
 * EUR Service Pack 3 (2188)
 * EUR Service Pack M (2250)

Future versions
These have the same release cycle as the original Windows XP, just delayed to X amount of years.