-
Hieroglyphics in Egypt: Early form of written communication. -
Cave paintings and petroglyphs: Early forms of visual communication. -
Greek and Roman communication networks: Development of postal systems and messenger services. -
Printing press: Invention by Johannes Gutenberg revolutionizes mass communication. -
Telegraph: Samuel Morse develops Morse code, enabling long-distance communication. -
Radio: Marconi's wireless telegraphy paves the way for broadcast communication.