What Does Windows on ARM (WOA) Mean?Windows on ARM (WOA) is a type of Windows operating system (OS) specifically designed to be installed and used on devices with ARM-based processor architectures.
WOA is the former name of Windows RT - the Windows 8 operating sytems that runs on the same ARM processor. This OS is similar to other flavors of Windows 8 but includes capabilities that utilize the functionality of ARM processors.
WOA and RT are often used synonymously, though Windows RT is now the official name according to Microsoft. This should not be confused with WinRT which refers to the Windows Runtime APIs used by programmers for coding Win apps.