A computer is an electronic device that processes data according to a set of instructions called a program. It performs a variety of tasks, such as calculations, data processing, and information storage. Computers can range from large servers to personal laptops and smartphones. Key components include:
1. **Central Processing Unit (CPU)**: The "brain" of the computer that performs instructions and calculations.
2. **Memory (RAM)**: Temporary storage that holds data and instructions currently in use.
3. **Storage**: Long-term data storage, such as hard drives or solid-state drives.
4. **Input Devices**: Tools used to provide data to the computer, such as keyboards and mice.
5. **Output Devices**: Tools used to receive data from the computer, such as monitors and printers.
6. **Motherboard**: The main circuit board that connects all components of the computer.
7. **Software**: Programs and operating systems that instruct the hardware on how to perform tasks.
Computers are used for a wide range of applications, including work, communication, entertainment, and research.