This refers to a specific build of the Android operating system that has been adapted to run on computers with x86 architecture processors, rather than the ARM processors typically found in mobile devices. Version 8.1 signifies the Android release it is based upon (Oreo), and “r1” likely denotes the first release or revision of the x86 adaptation for that version. It essentially offers the Android experience on devices like laptops and desktop computers.
The significance of this adaptation lies in its ability to broaden the applicability of the Android ecosystem. By enabling Android to function on standard PC hardware, it allows users to leverage Android applications and functionalities on devices they may already own or are more accustomed to using. Historically, it provided an alternative operating system option for older or low-powered computers, potentially extending their lifespan and offering a familiar mobile-like interface. It also opens possibilities for developers to test their Android applications on a wider range of hardware configurations.