For questions related to the remote control of devices and the design of remote controls.
"remote" means distant, and remote-controlling means "control" something from a distance, without any electrical or physical contact to the device-to-control. (Quite similar to Wireless... i.e. no-wire. However the term Wireless transmission commonly used for radio-waves).
However, a remote-control system not necessarily use radio-wave-signal, it can use infrared(IR)-signal, or many-other type of signal.
Just like wireless-radio-transmission, remote-controling also have similar steps, like 1. Input on remote controller by user-> 2. Signal-generation -> 3. Signal radiation or transmission -> 4. Sensing the signal on the remote controlled gadget -> 5. decode the signal -> action or required-change on machine.