A ROM in terms of the Android OS is the OS interface, including apps and firmware that have been loaded into the read-only memory of the device. Users can change this firmware and interface by changing or updating the ROM. This process is called ‘flashing a ROM’.
With select Lenovo Android Tablets, Anti-Illegal ROM Flash allows enterprises/schools to essentially “lock” their devices. Preventing misuse by restricting access to unauthorized data or entertainment apps. Meaning devices are used only for their intended purpose.