PC (Personal Computer)

A personal computer (PC) is a digital computer designed for use by one person at a time, small and affordable enough for individuals, small businesses, and schools to own, and operated directly by an end user rather than by a technician or administrator.¹³ A typical PC combines a central processing unit, memory, and peripherals such as a screen, keyboard, mouse, and printer, and runs commercial software including word processors and web browsers.¹³ Beyond productivity, the PC has become one of the principal platforms for video games, alongside its uses for browsing the internet, email, and multimedia.³¹⁴ The term was first recorded in the period 1975–1980.³

Origins and the microprocessor

The history of the personal computer began in the mid-20th century with room-sized electronic machines used chiefly by governments and large corporations, and turned on the invention of the microprocessor in the 1970s, which for the first time fit the core functions of a computer onto a single chip.¹⁶¹⁸ By the definition dictionaries later adopted, a personal computer is built around a microprocessor, has its own operating system, software, and peripherals, and can be linked to networks.³ The first personal computer was the Altair, made by MITS in 1974, which appeared to enthusiasts less as a usable computer than as a hobby kit.¹³¹⁸

The personal computer industry proper began in 1977 with the Apple II, the Tandy Radio Shack TRS-80, and the Commodore PET, machines that brought individual ownership, user programming, and affordability relative to mainframes within reach.¹³¹⁸ The introduction of the IBM PC in 1981, running Microsoft’s MS-DOS operating system, established a standard architecture that other manufacturers could follow, and IBM’s entry legitimized the personal computer as a category.¹³¹⁶ Iconic home models such as the Apple II and the Commodore 64 carried computing into homes and small businesses during the same period.¹⁶

The launch of Windows 1.0 in 1985 introduced a graphical user interface that made PCs more accessible to the general public, and Windows evolved with each release; Windows 95, released in 1995, introduced the Start menu and taskbar that remain fundamental to Windows PCs.¹⁶ Even so, the machines remained daunting to newcomers: in a 1995 “CBS Evening News” report, a first-time buyer struggled with installation floppy disks, interface cables, and disk drives, and half of new users in one survey said they were ready to throw their computers out the window in frustration.¹⁸ That year home PC sales overtook business sales, up 25 percent from 1994, and the industry’s focus shifted from raw power toward ease of use.¹⁸

Hardware and operating systems

A PC’s central processing unit is the core of the system, containing the arithmetic, logic, and control circuitry needed to run the machine, while the motherboard connects all of its components.¹³¹⁴ Memory divides into main memory such as random-access memory (RAM) and auxiliary storage such as a magnetic hard drive or a solid-state drive, the latter using flash memory chips for faster read and write speeds, greater durability, and lower power consumption.¹³¹⁴ Input devices include the keyboard and mouse, and output devices the display screen and printer; a dedicated graphics card handles the rendering of images, video, and games, improving performance in graphics-intensive tasks.¹³¹⁴

System software manages the hardware while application software carries out user commands, the two together being essential to operation.¹³ Personal computers run different operating systems, chiefly Microsoft Windows, but also Linux and Apple’s macOS, each with its own interface, and users interact with them through a graphical user interface built on visual metaphors and symbols.¹³¹⁴ PC hardware has diversified from the stationary desktop — a tower or case with separate input and output devices — into the all-in-one, which combines monitor and components in one unit, and the laptop, which folds all components into a single portable device.¹⁴¹⁶ The line between PCs and tablets blurred further with touch-friendly designs such as Windows 8 in 2012 and convertible devices like the Microsoft Surface Pro.¹⁶

The Mac-versus-PC distinction

In common usage “PC” is often contrasted with the Apple Macintosh, though Macs are themselves personal computers; Apple’s own boilerplate described the company as having “ignited the personal computer revolution in the 1970s with the Apple II and reinvented the personal computer in the 1980s with the Macintosh”.¹⁰ The main operating system for Apple machines is macOS while other PCs run Windows, yet Macs are able to run both, and a Mac can run Windows directly.⁶¹⁰ Windows PCs are sold by a wide range of manufacturers and retailers, offering broad customization, a wide price range, and user-serviceable parts, whereas Macs are exclusive to Apple, which limits their availability but keeps prices and features consistent.⁶ Both Windows PCs and Macs have long been available with Intel processors, and both run most open-source software; the debate over which is better has run for decades, with the choice frequently reducing to personal preference.⁶¹¹

The PC as a gaming platform

The PC is among the oldest and most open platforms for video games, a lineage that reaches back to the first computers themselves. The interactive game of Noughts and Crosses (Tic-Tac-Toe), OXO, was developed on the EDSAC by the PhD student Sandy Douglas around 1952, played by dialing moves on a telephone dial — an early demonstration that a general-purpose computer could run games.² Because PC hardware is upgradeable and its operating systems open to third-party software, the platform accommodates everything from lightweight web-based titles to graphically demanding games driven by dedicated graphics cards.⁶¹⁴

The retail landscape reflects this: PCs are marketed and sold in categories that include dedicated gaming desktops and prebuilt gaming towers alongside general-purpose machines, with graphics cards singled out as the component that improves performance in gaming and video editing.¹⁴¹⁹ Games reach PC users through digital distribution and packaged software across the Windows, macOS, and Linux operating systems.¹⁴

Cultural and economic significance

Time magazine named the personal computer its “Machine of the Year” in 1982, marking the device’s arrival as a mainstream force.³ Experts in 1995 predicted that half of American households would own computers by 1998; the milestone was in fact reached in 2000.¹⁸ The evolution of personal computers has since reshaped work, learning, communication, and entertainment, making the ability to work and connect from anywhere a defining feature of modern life.¹⁶¹⁸ As of June 2026, chipmakers such as Intel, AMD, and Nvidia continued to compete over the personal-computer market, with Nvidia announcing a push into PC chips positioned around artificial intelligence.³