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History of the Personal Computer Timeline
(1971 - Present)The history of the personal computer traces the evolution of affordable, user-friendly computing machines from the mid-1970s onward. Beginning with hobbyist kits like the Altair 8800 and breakthrough products such as the Apple II, the industry expanded rapidly with the IBM PC, graphical user interfaces from Apple and Microsoft, portable laptops, and today's powerful multi-purpose devices that have transformed work, education, and daily life worldwide. More Less
Early Computing
Konrad Zuse completes the Z3 computer
May 12, 1941
German engineer Konrad Zuse completed the Z3, the world's first working programmable, fully automatic digital computer. Built from electromechanical relays, the Z3 demonstrated that complex calculations could be automated by machines, laying conceptual groundwork for all future computing devices.
Image source: Z3 (computer)
ENIAC is unveiled at the University of Pennsylvania
Feb 15, 1946
The Electronic Numerical Integrator and Computer (ENIAC) was publicly unveiled as one of the first general-purpose electronic digital computers. Weighing 30 tons and filling an entire room with vacuum tubes, ENIAC could perform thousands of calculations per second and inspired a generation of computer designers.
Image source: ENIAC
The transistor is invented at Bell Labs
Dec 23, 1947
John Bardeen, Walter Brattain, and William Shockley of Bell Labs invented the transistor, a tiny semiconductor device that replaced bulky, unreliable vacuum tubes. The transistor became the fundamental building block of modern electronics and made compact, affordable computers possible.
Image source: Transistor
Integrated circuit invented independently by Kilby and Noyce
Sep 12, 1958
Jack Kilby of Texas Instruments demonstrated the first integrated circuit in September 1958, followed shortly by Robert Noyce's silicon-based version at Fairchild Semiconductor. By combining multiple transistors on a single chip, the IC enabled dramatic miniaturization and cost reduction in electronics.
Image source: Integrated circuit
Douglas Engelbart demonstrates the computer mouse
Dec 9, 1968
Douglas Engelbart's famous 'Mother of All Demos' in San Francisco introduced the computer mouse, hypertext, on-screen windows, and video conferencing. His vision of interactive computing profoundly shaped how people would eventually use personal computers.
Image source: The Mother of All Demos
Microcomputer Revolution
Intel introduces the first commercial microprocessor, the 4004
Nov 15, 1971
Intel released the 4004, the first commercially available microprocessor, packing a complete CPU onto a single chip. Originally developed for a Japanese calculator, the 4004 proved that inexpensive processors could power general-purpose computers, making the personal computer feasible.
Image source: Intel 4004
Xerox PARC develops the Alto workstation
Mar 1, 1973
Researchers at Xerox PARC created the Alto, the first computer designed around a graphical user interface with windows, icons, and a mouse. Though never sold commercially, the Alto's innovations directly inspired later systems like the Apple Macintosh.
Image source: Xerox Alto
Altair 8800 launches the microcomputer era
Jan 1, 1975
MITS announced the Altair 8800 on the cover of Popular Electronics, offering hobbyists an affordable build-it-yourself computer based on Intel's 8080 chip. Its runaway success spawned the homebrew computing movement and prompted Paul Allen and Bill Gates to write Altair BASIC, founding Microsoft.
Image source: Altair 8800
Apple I goes on sale
Jul 1, 1976
Steve Wozniak and Steve Jobs began selling the Apple I, a fully assembled circuit board for hobbyists priced at $666.66. About 200 units were built, marking the humble start of what would become one of the world's most valuable companies.
Image source: Apple I
Commodore PET, Apple II, and TRS-80 debut
Jun 1, 1977
The '1977 Trinity' of complete, ready-to-use home computers arrived: the Commodore PET, the Apple II, and the Tandy TRS-80. For the first time, ordinary consumers could buy a working personal computer off the shelf, igniting mass-market interest in home computing.
Image source: Home computer
Key Facts
- The Intel 4004 (1971), the first commercially available microprocessor, made it possible to build an entire computer on a single chip, laying the foundation for personal computers.
- The Altair 8800 (1975) is widely considered the first successful personal computer; its popularity inspired Bill Gates and Paul Allen to found Microsoft to write software for it.
- The Apple II (1977) was one of the first pre-assembled, mass-market personal computers with color graphics, helping bring computing into homes and schools.
- The IBM PC (1981), running MS-DOS, established hardware standards and software compatibility that still dominate much of the PC market today.
- Apple's Macintosh (1984) popularized the graphical user interface and mouse, making computers accessible to non-technical users and shaping modern computing design.
Source
This History of the Personal Computer timeline was generated with the help of AI, using information found on the internet.
We work hard to keep these timelines accurate, but mistakes do get through. If you spot one, email us at [email protected] and we'll fix it for future visitors.
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