Introduction of Computer

Computers are automatic electronic devices that can perform complex tasks by breaking them into simple calculations and doing them extremely quickly .They have the ability to store, manipulate, and communicate information. Computers had a massive impact on our lives.

Objective of the Study

1) This study will be conducted to achieve following objectives:
2) To get the general information about the computer.
3) To know the devices inserted inside the computer.
4) To know the functions of these devices.

Outlook of Computer

1) Desktop

2) Tower

3) Laptop (Notebook)

Major Component need to run the Computer

Power Supply or SMPS (Switch Mode Power Supply)
1) Motherboard
2) Processor (CPU)
3) RAM
4) Monitor

Major Component need to run the Computer

Power Supply or SMPS (Switch Mode Power Supply)
1) Motherboard
2) Processor (CPU)
3) RAM
4) Monitor

Power Supply or SMPS (Switch Mode Power Supply)

The Power Supply provides the necessary electrical power to make the PC operate. • It takes standard 220 volt AC power and converts it into 12V, 5V, and sometimes 3.3 volt DC power.
Two types of Power Supply
a. AT

b. ATX

Motherboard

Everything is connected to the motherboard.
A motherboard is a thin, flat piece of circuit board,, usually slightly larger than a piece of paper.

Processor (CPU)

The CPU (Central Processing Unit, also called the microprocessor) is where all the calculations take place in the PC.
CPUs will be either PGA (Pin Grid Array) or SEC (Single Edge Cartridge) or Pin less

RAM (Random Access Memory)

RAM (Random Access Memory) is where the CPU stores programs and data that it is currently using.
RAM is measured in units called "bytes“ and "megabytes."
SDRAM
DDRAM 1
DDRAM 2

Display Unit

Display unit
Monitor is output device all the processing information is Display in Display unit.
LCD (Liquid Crystal Display

CRT (Cathode Ray Tube)

Other Component

ROM (Read Only Memory)
When we switch on a computer, a program that is permanently stored in the ROM checks the computer and makes it ready for use. The ROM’s program cannot be changed.

Storage Device

Hard disk
• Hard drives store programs and data that are not currently being used by the CPU.
• Hard drive capacity is measured in megabytes and gigabytes.
IDE
40 Pin
SCSI
50 Pin
SATA

Floppy

A floppy disk is data storage medium that is composed of a disk of thin, flexible ("floppy") magnetic storage medium encased in a square or rectangular plastic shell. Two Types of Floppy are
3.5” Floppy

5.25” Floppy

Pen Drive (USB Flash Drive)

It is most portable Storage Device. Now a days high capacity pen drive is available in the Market.

USB Hard drive

It is the external Storage Drive. Using USB DATA Cable, we can use this Drive

ZIP Drive

The Zip drive is a medium-capacity removable disk storage system, introduced by Iomega in late 1994. Originally, Zip disks had a capacity of 100 MB, but later versions increased this to first 250 MB and then 750 MB.

CD /DVD

CD-ROM (an initialism of "Compact Disc Read-Only Memory") is a pre-pressed Compact Disc that contains data accessible to, but not writable by, a computer

VGA Card/ AGP Card

• The video card will have a distinct 15-pin DB connector.
• While most DB connectors will have only two rows of pins, the video card will have three rows