AI reviewed · sources pending. Book associations have not been verified.
Communication code
ConceptA code maps agreed signals to meanings that a receiver can recover.
Explanation or usage
A sender encodes a message and a receiver interprets signals using a shared mapping. The same meaning can travel through different media when the signals remain distinguishable. A code enables communication; it is not necessarily secret or encrypted.
Common misunderstandings
Every code is designed to keep a message secret.
In Code
General context reviewed · book attribution and sources pending
Flashlight signaling can illustrate shared encoding: a sender and receiver use an agreed mapping between signals and meanings.