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The abacus, one of the earliest known computing devices, was invented in Babylon. This simple yet effective tool used beads on rods to perform calculations and is still in use in some parts of the world today.

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Blaise Pascal invents the mechanical calculator, capable of addition and subtraction. This groundbreaking device, known as Pascal's Calculator or the Pascaline, laid the foundation for future mechanical computing machines.

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Joseph Marie Jacquard develops the Jacquard Loom, which uses punched cards to control weaving patterns. This concept of using cards to input instructions would later influence early computer designs.

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Charles Babbage designs the Analytical Engine, considered the first general-purpose computer concept. Although never built in his lifetime, it included key elements of modern computers like the arithmetic logic unit and memory.

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Herman Hollerith creates a punch card tabulating machine for the U.S. Census. This machine significantly reduced data processing time and led to the formation of the company that would later become IBM.

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Alan Turing introduces the concept of a universal machine, now known as the Turing Machine. This theoretical device becomes the foundation of computer science and the basis for the structure of modern computers.

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The Electronic Numerical Integrator and Computer (ENIAC) becomes operational. It's considered the first general-purpose electronic computer and could perform complex calculations much faster than previous machines.

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John Bardeen, Walter Brattain, and William Shockley invent the transistor at Bell Labs. This tiny electronic component would revolutionize the field of electronics and pave the way for smaller, faster computers.

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Intel releases the 4004, the first commercially available microprocessor. This 'computer on a chip' marks the beginning of the microcomputer revolution, leading to personal computers and embedded systems.

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IBM introduces its Personal Computer (PC), setting the standard for the modern personal computer industry. Its open architecture and use of off-the-shelf components help create a booming market for PC software and hardware.

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Tim Berners-Lee proposes the World Wide Web while working at CERN. This system of interlinked hypertext documents would transform how we access and share information, leading to the internet as we know it today.

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Apple releases the first iPhone, revolutionizing mobile computing and smartphones. This device combines a mobile phone, iPod, and internet communicator, setting the stage for the mobile-first digital era we live in today.