Windows Foursquare

Its codename is Foursquare. History:

1 May 1991 - Before Construction, used no sounds

23 January 1993 - Under Construction, used 3.1 sounds

21 May 1995 - Preliminary Release, used 95 sounds

1 August 1996 - Developer Release, used 4.0 sounds

11 May 1997 - Pre-Delta Release, used 5.0 sounds

1 September 1998 - Delta Release, used 98 sounds

19 May 1999 - PDA Release, used 2000 Beta 3 sounds

1 December 1999 - Pre-Alpha Release, used 2000 Beta 4 sounds

17 July 2000 - Alpha Release, used 2000 Final and ME sounds

1 May 2001 - Pre-Beta Release, used Whistler sounds

1 April 2002 - Beta 1, used XP sounds. Notice the date is Hancju's birthday

1 October 2005 - Beta 2, used Longhorn sounds

1 May 2007 - Beta 3, used Vista/7 sounds

1 April 2010 - Beta 4, used the same sounds as Beta 3

1 January 2011 - 2011 Test Release, used the same sounds as Beta 3, 4

23 May 2012 - 2012 Test Release, used the same sounds as Beta 3, 4, and 2011 Test Release

1 September 2013 - 2013 Test Release, used the same sounds as before

1 May 2014 - Final Beta Release, used the same sounds as before

1 February 2015 - Announcing official release and unveiling new name

28 September 2016 - Official release, by the name of Windows New Generation