How to read this timeline
A computing timeline is tidy only in hindsight. Technologies overlap, ideas appear in several places at nearly the same time, and a “first” often depends on how you define the word. The signposts below are meant to be a map, not a ranking, and where credit is shared or contested the text says so. Dates are given only where they are well established; otherwise a decade has to do.
Each decade has its own longer article, so this page keeps to the main threads.
The 1940s: wartime machines and a big idea
World War II created demand for fast calculation: artillery tables, codebreaking and scientific work. Relay machines such as the Harvard Mark I, vacuum-tube machines such as the British Colossus codebreaking systems, and the American ENIAC (completed 1945) showed that automatic calculation could work at scale. The decade’s most lasting idea was the stored-program concept: keep instructions in memory alongside data. Small stored-program machines ran in Britain in 1948 and 1949. The transistor was announced in 1947 at Bell Labs.
The 1950s: from laboratories to business
Computers became products. The UNIVAC I, delivered in 1951, and the IBM 701, announced in 1952, were among the early commercial computers. Magnetic tape, magnetic core memory and the first disk drives appeared. Programmers gained compilers and high-level languages: FORTRAN in 1957, Lisp in the late 1950s and COBOL in 1959. Transistors began replacing tubes. Integrated circuits were demonstrated at the very end of the decade.
The 1960s: sharing, compatibility and the first networks
The IBM System/360, announced in 1964, popularized the idea of a family of compatible machines, and mainframes became standard in large organizations. Time-sharing systems let many people use one computer interactively, and BASIC was created at Dartmouth for students. Minicomputers such as the PDP-8 put computing within reach of laboratories. Integrated circuits entered commercial machines. Network researchers developed packet switching, and ARPANET made its first connections in 1969. Douglas Engelbart’s 1968 demonstration previewed the mouse and linked documents.
The 1970s: the microprocessor and the hobbyist
Intel’s 4004 microprocessor appeared in 1971, followed by more capable chips. Unix and the C language emerged at Bell Labs. Email was developed on ARPANET. In 1975 the Altair 8800 kit excited hobbyists, and in 1977 the Apple II, Commodore PET and TRS-80 offered ready-to-use machines. VisiCalc in 1979 showed a business use for a small computer. Pong and other arcade games, and the Atari 2600 in 1977, made video games a consumer technology. At Xerox, researchers built the Alto, with a graphical screen and Ethernet-style networking.
The 1980s: the PC standard and the graphical interface
IBM’s Personal Computer arrived in 1981 and, through compatible clones, set the main standard for office computing. Home computers such as the Commodore 64, ZX Spectrum and BBC Micro entered millions of homes, especially in Britain and North America. Lotus 1-2-3, word processors and desktop publishing made PCs useful at work. The Macintosh in 1984 and Windows in 1985 brought the graphical interface to a wider audience. ARPANET adopted TCP/IP in 1983, and the Morris worm in 1988 was an early lesson in network security. Floppy disks and the first CD-ROMs defined how software was shared.
The 1990s: the web and multimedia
Tim Berners-Lee and colleagues built the first web software around 1990, and the Mosaic and Netscape browsers drew millions of people to it in the mid-1990s. Email became an everyday tool, search engines and directories organized the web, and Google appeared in 1998. Windows 95 and CD-ROM multimedia made the PC a family entertainment machine. Linux began in 1991. Online shopping and the dot-com boom began, followed by a bust in 2000 and 2001. The Y2K problem demanded a great deal of preparation.
The 2000s: broadband, social sites and the smartphone
Broadband and Wi-Fi made the internet an always-on part of daily life. Wikipedia, Facebook, YouTube and Twitter appeared between 2001 and 2006. Flat screens replaced CRT monitors, flash memory replaced many floppy disks and CDs, and multi-core processors responded to the limits on single-chip speed. Amazon began renting computing power in 2006, an early cloud service. The iPhone in 2007 and the App Store and first Android phone in 2008 launched the modern smartphone era, though BlackBerry and other devices had paved the way.
The 2010s: apps, the cloud and machine learning
The phone became the main computer for many people, and tablets joined it. Cloud services moved storage and software onto remote servers. Deep learning produced striking advances in image and speech recognition from about 2012, including AlphaGo’s 2016 victory at Go, and the Transformer design appeared in 2017. Privacy law, surveillance revelations, ransomware and hardware flaws such as Spectre kept security in the headlines. Chip makers reported that shrinking transistors was getting harder and costlier.
The 2020s so far: remote work and generative AI
The pandemic of 2020 moved school and work online almost overnight. Chip shortages exposed how concentrated manufacturing is. Generative AI tools, which produce text, images and code, became widely available from late 2022, bringing both enthusiasm and concern about accuracy, copyright and energy use. Because the decade is still unfolding, it is too early to tell which of today’s developments will matter most.
Patterns across the decades
Looking across the whole timeline, a few patterns recur:
- Machines get smaller and cheaper, and each step widens the group of people who can use them: from governments to corporations, then hobbyists, households and finally pockets.
- Software and standards often matter as much as hardware. Compatibility, languages and operating systems let work carry over from one machine to the next.
- Networks turn separate machines into a shared space, whether that meant time-sharing terminals, ARPANET, the web or mobile apps.
- Predictions are unreliable. Many technologies took longer than expected to arrive, and others appeared suddenly.
- Breakthroughs usually involve teams and several parallel efforts rather than a lone inventor, so single-name credit should be treated with care.
A timeline like this can only show where the road turned. For the reasons behind each turn, the individual decade articles are the next step.