| Prehistory; origin undated | Spoken language | Reach ends where voice and memory end. | Communities, teaching, culture, exchange | None distinct; speech carries teaching, performance and trade. | Shared languages, customs, meeting places | Voice and ears | Families, teachers, storytellers, leaders |
| c. 3300–3200 BCE (British Museum) | Writing | Records are hard to keep, verify and carry. | Government, law, trade, schools, religion | Scribes and record-keeping, paid by institutions | Scripts, literacy, clay, papyrus, parchment, ink | Styluses, tablets, scrolls | Scribes, schools, courts, temples, officials |
| Manuscripts from the first writing; codex from the 1st century CE (Smithsonian) | Manuscripts and codices | Hand copying is slow and costly, so copies are few. | Scholars, clergy, lawyers, schools, rulers | Commissioned copies, patronage, libraries | Writing materials, skilled copyists, libraries | Scrolls, codices, pens | Scribes, monasteries, courts, universities, libraries |
| East Asia, 7th–8th centuries; Europe, c. 1450s (Library of Congress) | Printing | Hand copying limits speed, volume and consistency. | Schools, religion, science, commerce, public debate | Selling books and pamphlets | Presses, type, paper, ink, distribution | Presses, typesetting gear | Printers, publishers, booksellers, authors, distributors |
| Newcomen engine, 1712; Watt's condenser patent, 1769 (Science Museum) | Steam engine | Power is fixed in place and limited by muscle. | Mining, manufacturing, trade, travel | Engine sales and leases; fares and freight | Coal, iron, steel, machine shops, railways, ports | Stationary engines, locomotives, steamships | Engine makers, railroads, shipping lines, repairers |
| 1830s; first public Morse message, 1844 | Telegraphy | News moves no faster than its carrier. | Trade, government, press, railways, finance | Message fees, equipment, network services | Lines, poles, stations, power, trained operators | Keys, relays, receivers | Telegraph companies, news agencies, railways |
| 1860s; four-stroke engine, 1876 (National Diet Library of Japan) | Internal combustion engine | Travel and freight are bound to fixed routes and timetables. | Retail, logistics, leisure, commuting | Vehicle sales and finance; fuel, repair, insurance, dealers | Steel, oil, fuel, roads, parts | Cars, trucks, motorcycles | Automakers, garages, fuel suppliers, insurers, dealers |
| First call, 1876 | Telephone | No live voice at a distance. | Business, trade, homes, public services | Subscriptions, call charges, equipment rental | Cables, exchanges, power, rights of way | Handsets, exchanges | Telephone companies, network operators |
| Wireless telegraphy, 1890s; regular broadcasting, 1920 (Computer History Museum) | Radio | Sound cannot reach a mass audience at once. | News, entertainment, education, public information | Advertising, public funding, licences, sponsorship | Spectrum, transmitters, antennas, studios, power | Transmitters, receivers | Broadcasters, networks, regulators, advertisers |
| Experiments, late 1920s; regular service, 1930s; mass adoption after WWII | Television | Moving pictures and sound cannot reach mass audiences. | News, entertainment, education, advertising | Advertising, subscriptions, carriage fees, licensing | Towers, spectrum, satellites, cable, power | Sets, cameras, studio gear | Broadcasters, networks, cable and satellite operators |
| Electronic computing from the 1940s; ENIAC unveiled, 1946 | Computer | Processing and storing data is costly, specialist and hard to reach. | Manufacturing, finance, aerospace, government, research | Hardware sales and leases, software licences, maintenance, services | Semiconductors, power, operating systems, software | Mainframes, servers, PCs | IBM and other vendors, integrators, service firms |
| First ARPANET hosts, 1969; public and commercial growth, late 1980s–1990s (Internet Society) | Internet | Networks stand alone; sharing information is costly. | Search, e-commerce, publishing, education, communication, cloud | Access fees, advertising, transactions, cloud usage | Telecoms, routers, data centers, protocols | Routers, servers, PCs, modems | Internet providers, backbone and hosting operators, web platforms |
| Mobile web, 1990s; i-mode, 1999; smartphone boom from 2007 | Mobile internet | Access is tied to a fixed place. | Social media, navigation, messaging, gig work | Carrier plans, app sales, advertising, commissions, gig fees | Cell towers, spectrum, backhaul, chips | Smartphones, network gear | Carriers, app stores, iOS, Android |
| Transformer, 2017; public uptake of generative AI, 2022 (original paper) | Generative AI, including large language models | Writing, code and media once demanded scarce expertise and time. | Writing, programming, design, media, customer support | Metered API use, subscriptions, enterprise licences, hosted customization | Cloud, data centers, power, networking, training and inference data | GPUs, CPUs, servers, accelerators | Cloud providers, model developers, AI platforms |
| Long research history; LLM-enabled agents grew sharply in 2023 (2023 survey) | AI agents | Acting across systems raises problems of integration, permission, reliability and accountability. | Workflow automation, private or public data spaces, agentic commerce in retail, leisure and services | Subscriptions, usage-based orchestration, managed services, transaction commissions, possibly outcome-based fees | Cloud and edge computing, virtual machines, identity, authorized access, tools, workflows | GPUs, CPUs, servers, edge devices | Agent runtimes, model providers, workflow orchestration, data-space operators |