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The Stone Age was the earliest period of human history, lasting from about 3.4 million years ago to between 4000 and 2000 BCE, characterized by the use of stone tools. It is divided into three periods—Paleolithic, Mesolithic, and Neolithic—and marked by developments from basic toolmaking and hunting-gathering to agriculture and permanent settlements, ending with the discovery of metalworking and the advent of the Bronze Age.

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An agricultural revolution is a period of rapid and unprecedented growth in food production driven by transformative advancements in farming techniques. Humanity has experienced three main agricultural revolutions: the Neolithic Revolution (starting around 10,000 BCE) which marked the transition from hunting and gathering to settled farming, the Second Agricultural Revolution (starting in the 18th century in Britain) which brought about selective breeding, systematic crop rotation, and new machinery

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The Industrial Revolution was a period of rapid scientific, technological, and economic change, beginning in Great Britain in the late 18th century and spreading worldwide, that transformed agrarian societies into industrialized, urban ones through the mass production of goods in factories powered by machines. Key developments included the invention of the steam engine, the mechanization of the textile industry

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The Digital Revolution is the transition from mechanical and analog electronic technology to digital electronics, marking the shift from the Industrial Age to the Information Age and bringing about significant changes in communication, society, and the economy. This transformation began with the advent of the microprocessor and personal computers in the 1970s, followed by the internet, mobile technology, social media, and more recently, AI and big data, fundamentally altering how information is processed, shared, and used.

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Mobile technology is portable communication and computing technology, encompassing devices like smartphones, tablets, and wearables, along with the wireless networks that connect them. It enables users to communicate, access information, and perform various tasks from virtually anywhere, revolutionizing communication, business, and entertainment.

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The Information Age is a historical period that began in the mid-20th century. It is characterized by a rapid shift from traditional industries, as established during the Industrial Revolution, to an economy centered on information technology.