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A computer is a machine for manipulating data according to a list of instructions.

Computers take many physical forms. Early electronic computers were the size of a large room, consuming as much power as several hundred modern personal computers. Today, computers can be made small enough to fit into a wrist watch and be powered from a watch battery. Society has come to recognize personal computers and their portable equivalent, the laptop computer, as icons of the information age; they are what most people think of as "a computer". However, the most common form of computer in use today is by far the embedded computer. Embedded computers are small, simple devices that are often used to control other devices¡ªfor example, they may be found in machines ranging from fighter aircraft to industrial robots, digital cameras, and even children's toys.

Computers are incredibly useful for a variety of reasons. They can process vast amounts of information quickly and accurately, which makes them invaluable for tasks like data analysis, scientific research, and financial modeling.

Computers also allow us to communicate with people all over the world, whether it's through email, social media, or video conferencing. They make it easy to access and share information, whether it's through the internet, cloud storage, or local networks.

In addition, computers have revolutionized many industries, from healthcare to education to entertainment. They have enabled new forms of creativity and innovation, such as 3D printing and virtual reality.

Overall, computers have become an essential part of our daily lives, and their usefulness will only continue to grow as technology advances.

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