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Hardware refers to the physical components of a computer, like the keyboard, monitor, and motherboard. Software, on the other hand, consists of instructions that tell the hardware what to do. Operating systems like Windows or macOS are examples of software, while applications like Microsoft Word or Chrome are programs that run on the operating system. For example, you use your keyboard (hardware) to type a document in Microsoft Word (software).

A computer's main components include the Central Processing Unit (CPU), the brain that executes instructions; Random Access Memory (RAM), temporary storage for active data; storage devices like hard drives or SSDs, for permanent data storage; the motherboard, which connects all components; and input/output devices like keyboard, mouse, and monitor for interacting with the computer. For example, when you open a document, the CPU reads it from the storage, loads it into RAM, and displays it on the monitor.

A computer is an electronic device that can process, store, and retrieve information. It consists of hardware, the physical components, and software, the instructions that tell the hardware what to do. Computers are used in countless ways, from simple tasks like browsing the internet to complex calculations and scientific research. For example, your smartphone is a computer, and it uses apps (software) to access the internet and make calls (functions).