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 What is internet? | इंटरनेट क्या है ? The internet is a vast network of interconnected devices and computers that enable the exchange of information and data between users worldwide. It is a technology that has revolutionized the way we communicate, learn, work, and entertain ourselves. At its core, the internet is a system of networks that uses standardized communication protocols to connect computers and devices across the world. These networks are managed by internet service providers (ISPs) who provide internet access to users through wired or wireless connections. The internet has its roots in the 1960s when the United States Department of Defense developed a network called ARPANET to link its research institutions. ARPANET was the first packet-switching network, which means that data was broken down into smaller packets and sent across the network to its destination. Over the years, the internet has evolved and grown exponentially, connecting millions of computers and device...

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WHAT IS THE HARD DISK DRIVE? A hard disk, also known as a hard drive, is a storage device used in computers and other digital devices to store data. It is a non-volatile storage device, which means that data is retained even when the power is turned off. The hard disk consists of one or more metal platters coated with a magnetic material. These platters spin rapidly while a read/write head moves across the surface to read or write data. The read/write head is mounted on an arm that can move in and out, allowing it to access different parts of the platter. The data on a hard disk is stored in binary form as magnetic patterns on the surface of the platters. The read/write head can change the magnetic state of these patterns, which allows it to write data to the disk or read data from the disk. Hard disks are available in various sizes and capacities, ranging from a few gigabytes to several terabytes. They are commonly used in desktop and laptop computers, servers, and other digital devic...