Information theory, also known as communication theory, is the study of how data is transmitted and received through communication channels. The field encompasses a wide range of topics including coding theory, signal processing, and data compression. Some common synonyms for information theory include communication theory, cybernetics, and coding theory. Communication theory refers to the study of how information is transmitted through various channels such as speech, writing, and broadcasting. Cybernetics, on the other hand, is the study of feedback mechanisms in various systems such as machines and organisms. Coding theory specifically focuses on methods for efficiently encoding information for transmission and storage purposes.