The Bluetooth feature built into most A/V receivers (or Bluetooth adapters) is to allow a portable device such as a phone or tablet to stream music to that receiver. This way you can listen to your digital music or streaming apps like Pandora or Spotify from your phone through your main speaker system.
An embedded system is a computer system with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints.[1][2] It is embedded as part of a complete device often including hardware and mechanical parts.
Definition of tab for English Language Learners : a small, flat piece on a box, envelope, etc., that can be put into a hole in order to hold two parts together : a small, flat piece that sticks out from the edge of something (such as a folder) and allows you to identify and find it easily