CPU

The basic processing of a computer begins with memory fetch or read cycle and the memory fetch is routed to the memory unit.

The memory unit consists of a large number of storage locations each with its own unique address. The CPU can randomly access any location in memory where RAM is often used. And this memory organization is typical for most microprocessors today. RAM being a volatile memory there should be power for the memory to contain data so a portion of memory unit is often built using read-only memory (ROM) chips. The program stored by a ROM is permanent and is not lost when power is removed. The memory unit’s address selector/decoder circuit examines the binary number on the address lines and selects the proper memory location to be accessed. In example, CPU is reading from memory, it activates its Memory Read control signal.

 KEYBOARD

It is one of the most important parts of a computer which is used to enter commands, text, numerical data and other types of data by pressing the keys on the keyboard.

A user talks with a computer through input devices such as keyboard and mouse. Input devices are used to enter data to a computer. The entered data then converted into machine language so that a CPU understands the data or instruction comes through the input devices.

                                                                                                                  MOUSE                                                                                                                                                                It is a device used for computer input. It points and click on icons, menus, command buttons or activates something on a computer. The GUI (Graphical user interface) of current applications and programs are user friendly and easier to navigate using computer mouse. 

MONITOR

What are the Functions of the Monitor of the Computer?

Computers by Svadilfari (http://www.flickr.com/photos/22280677@N07/2264355654/)

A computer monitor is a display adapter that displays information processed by the computer's video card. When a video card or graphics card converts binary information from 1s and 0s into images, these images are displayed onto the directly connected monitor. 

AVR or AUTOMATIC VOLTAGE REGULATOR

 

- also known as the "Automatic Voltage Regulator"

- It is designed to automatically maintain a constant voltage level.

- It regulates the sudden flow of electric current from AC supply to the PC.

- It may use an electromechanical mechanism, or passive or active electronic
components.

- Depending on the design, it may be used to regulate one or more AC or DC voltages.

An Intel Processor

The processor, or CPU, of a computer is basically the brains of the computer. The processor is responsible for interpreting every code it receives from the other computer components, and making it usable to your operating system. Some common types of processors are Intel Core 2 Duo and AMD Phenom. A processor's speed will often determine the overall speed of your computer.

Read more: Different Parts of the Computer and Their Function | eHow.com http://www.ehow.com/about_5349606_different-parts-computer-function.html#ixzz1CQrcARn7