Windows 2019 (Limited Edition)

Windows 2019 is a next version of Windows 2018. It was released on May 2, 2019.

Build 17523
Leaked on June 29, 2018 by a unknown hackers group (but setup download link isn't leaked)

Build 17582
Released on July 11, 2018 (fast ring). Nothing is changed.

Build 17602
Released on August 2, 2018. This build added support for old Windows programs.

Build 17701
First Technical Preview build released fast ring on September 21, 2018 (also known as September Technical Preview or Technical Preview 1). The boot screen has changed boot message to "Starting Windows 2019 Pre-Release"

Build 17852
Leaked on October 13, 2018 by a unknown user. A download link is available. In March 21, 2019, this build has expired.

Build 17938
Released on November 12, 2018. Known as November Technical Preview.

Build 17938.1
Released on November 20, 2018. The boot screen has changed, boot message changed to "Starting Windows 2019" and added "Technical Preview" text box.

Build 17985
Released on December 27, 2018.

Build 18102
Released fast ring on January 16, 2019. This is official Technical Preview 2.

Build 18138
Released on February 11, 2019. This is February Technical Preview.

Build 181xx
This is a unknown build of Windows 2019, leaked on March 1, 2019 but in the screenshot, build number is blurred.

Build 18172
First Insider Preview build released on March 20, 2019. This build has removed "Technical Preview" text box in boot screen.

Build 18188
Released fast ring on April 3, 2019. This is April Insider Preview.

Build 18201
Pre-RTM build released on April 23, 2019.

Build 18228
RTM

Trivia

 * Windows 2019 is upgradeable from Windows 10, Windows 2015, Windows 2017, Windows 10.1 Windows 10.2 and Windows 2018.
 * Much like Windows 10, Windows 2019 has started development in mid-summer of first year and finished before summer of second year of development.