The official version number for the April 2018 Update.
Released as the "April 2018 Update," this version introduced several key features that improved user workflow and system management. The official version number for the April 2018 Update
While Version 1803 was a cornerstone update, it is important to note its current status: How to identify your Windows 10 version - Lenovo Support The official version number for the April 2018 Update