Information as a measurable physical quantity
Shannon defined information as reduction of uncertainty, measured in bits, independent of meaning. This let communication be engineered mathematically.
The Information
6 ideas
Everything is fundamentally information
Gleick argues genes, thoughts, and physics can be read as information processing. It-from-bit reframes reality as computational at root.
The talking drums of Africa
African drum languages encoded messages by mimicking tonal speech with built-in redundancy for error correction. Gleick uses them to show information principles predating electronics.
Entropy links thermodynamics and information
Shannon's entropy formula mirrors physical entropy, tying disorder to missing information. Maxwell's demon dramatizes the cost of erasing information.
Redundancy corrects for noise
Reliable transmission over noisy channels requires added redundancy to detect and fix errors. This trade-off between compression and reliability underlies all communication.
History as the rise of the informational
Gleick reads writing, dictionaries, telegraphy, and computing as one arc toward information as the master concept. Each technology reshaped how humans store and move knowledge.