Hardware - Computer Hardware

By: Jesse Miller

Computer is a collection of several components working together. Some of these components are essential, others add more performance. Adding extra parts expands the variety of task we can accomplish with computer.

Computer is made up of the following parts CPU and Peripherals. Software is the program that runs on hardware. It is classified into Application software and System Software. System Software has set of programs which control and co-ordinate the entire computer system. Application software is used to perform particular task.

The CPU Controls and executes all our computer operations. It ensures that the correct character is displayed on the monitor when you press a key on the keyboard. Cables from the CPU are connected to Keyboard, Monitor, Mouse, Printer etc. The brain behind all processes of the computer is contained within the system unit. Inside the system unit there are so many components available.

All the electronic components in a PC are mounted on a Printed Circuit Board (PCB), called the motherboard. Thin lines of metal on the surface of the fiberglass connect pins from one component to another, forming the computer`s electronic circuits. The Microprocessor, or Central Processing Unit (CPU), is the computer`s most important component.

It performs all the operations inside the computer. Random Access Memory (RAM) is used for the purpose of holding the information or data inside the program when the computer is running. When the computer is switched off, data present inside the RAM is also lost. RAM chips or modules can be added to empty ram chip slots. Floppy disk drive consists of a slot to accept a floppy disk, Recording/reading device helps us to read the data present on the floppy. This Floppy disk drive is provided by a motor which reads the data present in the floppy.

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Computer stores most of the information in Hard Disk Drive. It is the computers main permanent storage unit, holding large amounts of data and programs. Information or data is removed from the Hard disk only when we delete it.
All the components in a PC need electric power supply. The SMPS converts the normal household electric AC supply to +_ 5V and _+ 12V DC supply. Usually _+ 12V DC supply is connected to Motherboard, whereas _+5V DC supply to other peripherals such as Floppy, Hard disk.
Long narrow connectors allow us to plug in expansion chords like TV tuner and graphic card.

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