ADB

Source Android Debug Bridge (adb)  |  Android Studio  |  Android Developers

• A daemon (adbd), which runs commands on a device. The daemon runs as a background process on each device.
• A server, which manages communication between the client and the daemon. The server runs as a background process on your development machine.
• A client, which sends commands. The client runs on your development machine. You can invoke a client from a command-line terminal by issuing an adb command.