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The history of computers can be traced back to the invention of the abacus in ancient times. However, the modern computer as we know it today originated in the early 20th century. It has been an incredible journey of technological advancements and innovations that have revolutionized our world. The development of computers can be divided into several key milestones. The first electronic digital computer, called the ENIAC, was built during World War II to calculate artillery firing tables. It was massive in size, occupying an entire room and using vacuum tubes for its operation. The next significant advancement came with the invention of transistors in the late 1940s. Transistors made computers much smaller, more reliable, and less power-hungry compared to the earlier vacuum tube-based machines. This paved the way for the miniaturization of computers and the birth of the modern computing era. In the 1970s, another major breakthrough occurred with the introduction of microprocessors, which integrated the central processing unit (CPU) onto a single chip. This led to the development of personal computers (PCs) and made computing accessible to individuals in their homes and offices. The launch of the IBM PC in 1981 further popularized personal computing and standardized the hardware and software platform. The 1990s saw the rise of the internet, which revolutionized communication and changed the way we access and share information. It opened up new possibilities for e-commerce, social networking, and online services. The 21st century has witnessed further advancements in computing with the advent of smartphones, tablets, and cloud computing, enabling users to access their data and applications from anywhere in the world. In conclusion, the history of computers is an amazing journey that has witnessed the invention and evolution of various technological milestones. From the bulky room-sized machines of the past to the sleek and powerful devices of today, computers have changed the world in profound ways, impacting nearly every aspect of our lives.