The Xerox Star 8010 Information System, introduced in 1981, was an innovative and groundbreaking computer system. It holds the distinction of being the first commercial personal computer to feature a graphical user interface (GUI), incorporating advanced concepts such as bitmapped displays, windows, icons, folders, and a mouse for navigation. These features collectively established what is now known as the 'desktop metaphor' for computer interaction. Although commercially unsuccessful due to its high price and specialized market focus, the Star profoundly influenced future personal computing. Steve Jobs famously visited Xerox PARC (Palo Alto Research Center) in 1979, where his team observed and were inspired by the Star's GUI technology, which subsequently became a cornerstone of Apple's Lisa (1983) and Macintosh (1984) computers. In contrast, the IBM PC (1981) initially used a text-based interface, the Commodore 64 (1982) was known for its affordability and gaming, and the Altair 8800 (1975) was a very early microcomputer with toggle switches and LEDs for input/output, predating commercial GUIs by several years.

FORTRAN (Formula Translation), developed in the 1950s by a team at IBM led by John Backus, was the first widely used high-level language and was optimized for numerical and scientific computations.

Napier's Bones, invented by Scottish mathematician John Napier around 1617, was a manual calculating device designed to simplify complex multiplication and division problems. It consisted of a set of numbered rods (often made of bone, ivory, or wood) bearing multiplication tables. By arranging these rods appropriately, users could perform multiplication and division through a series of simpler additions and subtractions, significantly speeding up calculations compared to traditional long-hand methods. While it involved addition and subtraction in its operation, its main function was to facilitate the more complex multiplication and division. It was not a general-purpose mechanical calculator and did not directly serve functions like astronomical measurement or cartography, although it could be applied to calculations within those fields.

Charles Ranlett Flint, often referred to as the 'Father of Trusts,' was a financier and industrialist who, in 1911, engineered the consolidation of four distinct companies: the Tabulating Machine Company (founded by Herman Hollerith), the Computing Scale Company of America, the International Time Recording Company, and the Bundy Manufacturing Company. This merger resulted in the formation of the Computing-Tabulating-Recording Company (CTR). While Herman Hollerith's invention, the tabulating machine, was a foundational technology for CTR, he did not found the company itself. Thomas J. Watson, Sr. was later hired in 1914 as General Manager of CTR and became its President, famously renaming it International Business Machines (IBM) in 1924, overseeing its significant growth. Bill Gates, on the other hand, co-founded Microsoft much later in 1975.

Before the advent of magnetic disk drives, particularly in the mid-20th century, punched cards and paper tape were the most prevalent forms of secondary storage for computers. Programs and data were encoded by punching holes in specific patterns on these physical media. While they were relatively slow and prone to wear, they were essential for long-term data storage and input/output operations. Solid State Drives and Optical Discs are much more modern technologies that emerged much later, while ROM cartridges, though existing before disks, were primarily used for distributing software on game consoles or some early personal computers rather than general-purpose secondary storage for computing systems.

Joseph Jacquard, a French weaver and merchant, developed the Jacquard loom in 1804. This mechanical loom used a series of punched cards to control the weaving of intricate patterns in textiles, effectively automating the process. This concept of using punched cards to store information was a significant influence on later computing pioneers like Charles Babbage.

The magnetic disk drive, a crucial component for random-access secondary storage, was developed by a team at IBM led by Reynold B. Johnson. This groundbreaking technology was first unveiled in 1956 as part of the IBM 305 RAMAC (Random Access Method of Accounting and Control) computer system. The IBM 350 Disk File, as it was known, revolutionized data storage by offering direct, rapid access to large volumes of information, a significant advancement over sequential storage methods prevalent at the time. Apple Inc. and Microsoft Corporation were founded much later (in 1976 and 1975, respectively) and did not exist during the 1950s. While Bell Laboratories was a significant innovator in many fields, the magnetic disk drive is primarily credited to IBM.

ENIAC (Electronic Numerical Integrator and Computer), built at the University of Pennsylvania, was the first electronic general-purpose computer. It was Turing-complete and able to be reprogrammed to solve a wide range of computing problems.

Deep Blue was a chess-playing computer developed by IBM. Its victory over reigning world champion Garry Kasparov in a six-game match was seen as a landmark moment, demonstrating that a computer could defeat the best human player in a complex, strategic game.

The first ARPANET link was established between UCLA and the Stanford Research Institute. The programmer, Charley Kline, successfully transmitted the 'L' and the 'O' before the system crashed, making the first message "LO".