Windows 10 Anniversary Update: A guide to the builds

This summer, one year after the initial launch of Windows 10, Microsoft will release its first major update: the Windows 10 Anniversary Update. It will be delivered in the usual way -- via Windows Update -- and will install automatically on its own.
However, if you're curious (or apprehensive) about the upcoming update, you don't have to wait until the final release date to check it out. Microsoft has been releasing public preview builds, each one a little bit closer to the final version. Anyon