Basic Components of Computer Systems

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2. A printer is a device which makes a human-readable representation of graphics or text on paper. A printer is a device that accepts text and graphic output from a computer and transfers the information to paper, usually to standard size sheets of paper.


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3. A modem is a hardware device that converts data between transmission media so that it can be transmitted from computer to computer. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves.


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4. A motherboard is the circuit board found in general purpose microcomputers . It holds and allows communication between many of the crucial electronic components of a system, such as the central processing unit and memory, and provides connectors for other peripherals.


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5. The arithmetic and logic unit (ALU) of a computer system is the place where the actual execution of the instructions take place during the processing operations.


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6. The control unit and ALU usually are referred to as a processor, or central processing unit (CPU). The operational speed of the CPU primarily determines the speed of the computer as a whole.


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7. A processor is the computer's engine. The CPU is the part that actually does stuff by following the instructions of the computer program that it's running.


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8. An operating system is system software that manages computer hardware and software resources and provides common services for computer programs.


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9. CPU is the main processing unit of a computer system. It consists of a control unit and an arithmetic logic unit. A central processing unit (CPU) carries out the instructions of a computer program by performing the basic arithmetic, logic, controlling, and input/output operations specified by the instructions.


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10. An operating system is the most important software that runs on a computer. It manages the computer's memory and processes, as well as all of its software and hardware.


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11. The system unit, also known as a "tower", is the main part of a desktop computer. It includes the motherboard, CPU, RAM, and other components. A CPU is only a small part of a system unit. .


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12. Control unit is known as the brain of the computer. The control unit (CU) is a component of a computer's central processing unit (CPU) that directs the operation of the processor.


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13. When a computer or other device is not turned on or connected to other devices, it is said to be "offline."Offline can also mean not being connected to the Internet.


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14. CPU registers perform a variety of functions, a primary one of which is to offer temporary storage for the CPU to access information stored on the hard drive.


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15. A motherboard is the main circuit board found in general purpose microcomputers and expandable systems. It holds and allows communication between many of the components of the system such as CPU, and memory.


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16. A switched-mode power supply (SMPS) is an electronic circuit that converts power using switching devices. They are used in many places in a computer.


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17. The register is the smallest high speed storage area in the CPU. All data must be represented in register before it can not be processed. A register may hold an instruction, a storage address, or any kind of data .


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18. A backup UPS i.e. Uninterruptible Power System is often used with computers. If a UPS is not used with computers ,the data stored in the computer is almost when power is switched off.


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19. Monitors, printers, disk drives, keyboard, mouse are Hardware devices. Hardware devices refer to the physical components .Computer hardware is any physical device used in or with your machine, whereas software is a collection of code installed onto your computer's hard drive.


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20. An optical mouse is a computer mouse which uses a light source, typically a light-emitting diode (LED), and a light detector, such as an array of photodiodes, to detect movement relative to a surface.


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