Advances in photography, motion picture recording and publishing multiplied the number of movies, TY programs, and periodicals that brought new information into our homes. The number of telephone lines and frequency of telephone conversations was growing daily. New modes such as television were gobbling up bandwidth at an astounding rate. It took 1800 KHz for an intelligible voice channel but acceptable broadcast quality video was 4.5 MHz wide, including audio channel. Shannon's Theorem describes mathematically how much information can be transmitted on a channel of a given bandwidth.
Information theory extends across a broad field of sciences and disciplines.
Electronics, thermodynamics, and electromagnetic theory dictate capabilities and limitations of information storage and transmission hardware. Computer science, network theory, packet switching, and modulation theory deal with how the information is stored and routed from provider to recipient.