About Communication
Technology is built from physical materials, scientific principles, design choices, software, infrastructure, and human decisions. This page explains the core ideas without turning the topic into a how-to manual for unsafe behavior.
Writing
Writing stores language outside human memory.
Learn MorePrinting
Printing allowed many identical copies.
Learn MoreTelegraph
The electric telegraph sent coded messages through wires.
Learn MoreTelephone
Telephones converted sound into electrical signals and back.
Learn MoreRadio
Radio sends information with electromagnetic waves.
Learn MoreSatellites
Communication satellites relay signals over large regions.
Learn MoreInternet
Digital networks carry text, audio, video, and data globally.
Learn MoreDigital Media
Digital information can be copied rapidly.
Learn MoreWriting
Clay, paper, ink, printing, and digital text changed how information could be preserved and copied.
Printing
Books, newspapers, maps, laws, and scientific papers could reach much larger audiences.
Telegraph
Information could travel much faster than a person or vehicle carrying a physical message.
Telephone
Modern calls may travel through cellular or Internet networks rather than old copper lines.
Radio
Broadcasting, television, wireless networking, radar, satellites, and mobile phones use different radio frequencies.
Satellites
They support television, Internet links, weather data, navigation, and remote-area connections.
Internet
Email, websites, video calls, messaging, and cloud services all rely on Internet infrastructure.
Digital Media
This creates opportunities for education and creativity while making privacy, copyright, and source checking important.