Introduction and Fundamental of Computer for free Studying at home

 Studying Free of Cost Learning Computer Course.

    HOW TO OPEN THE COMPUTER?

• Press the power button in CPU.
• Click on Start Menu.
• Go to desire program.

        HOW TO CLOSE THE COMPUTER?

• Click on Start Menu.
• Go to 'Turn of Computer'.
• Click on Turn off.

Introduction of Computer

                The term of computer is derived from the Latin word “compute” which means to calculate, similarly in the English language the computer means to do mathematical operation. It is digital operating system device which manipulate numeric data. But computer is a very powerful to perform in a high speed. It accepts any kinds of information according to given instructions.   

(Definition) Meaning of Computer

                Computer is an electronic device which manipulates data word processing, editing, formatting, storing and output them. So it can process, numeric and non-numeric data.

(Character) Feature of computer

                There are facilities and feature of computer given below.

1.  Speed

2.  Store

3.  Input/output

4.  Versatility

5.  Diligence

6.  Process

7.  Accuracy

1.   Speed:

Computer can manipulate data in a huge speed. The time which computer takes to process data is very fast. It can process and operate 100 millions of data in a seconds.

2.   Store:

Computer has a high amount of data in its unit, computer can store length amount of data in it store devices. The storing data are express in bytes capacity. A byte can store one character of data. The units are given below.

01               =1 bit

8 bites        = 1 byte

1024 bytes = 1 KB (kilo bytes)

1024 KB     = 1 MB (mega bytes)

1024 MB    = 1 GB (Giga bytes)

Nowadays 80 GB, 160 GB, 320 GB data stores devises are available in the market.

3.   Input/ Output:

An input is raw information. It is a collection of letter. So we should give an instruction according to need from different devices likes: - key board, mouse, scanner, digital camera, web camera etc.

An output is a final processing of data on information as for given instruction, we will get output value from different devices. e.g. monitor, speaker, printer etc.

4.   Versatility:

Versatility is an ability to perform various task related to different field like science and technology, education, business, agriculture etc.

5.   Diligence:

It is a capacity to perform or performing related operation (work) without any kinds of tiredness and capable of formatting the required task continuous with the same speed, accuracy and efficiently without any error.

6.   Process:

Process is taken on data as for given instructions. It is totally inner process of the computer system.

7.   Accuracy:

Computer never gives wrong response to the user. The data given by the user may be wrong but the computer processes it in correct way because computer is depended by on user.

           INPUT DEVICES

 Keyboard:

Keyboard is a main input device. This helps us to input any instructions in to the computer system. There are different types of keyboard as given below.

 Base on Model;

a)                Normal Keyboard

b)                Multimedia Keyboard

c)                Flexible Keyboard

d)                Cordless  Keyboard

 a)    Ps/2 port keyboard

b)    USB port keyboard

 F1- F12     = Function Key

 A-Z           = Alphanumeric key

 0-9             = Numeric Key

 

 Other keys = Special keys (Enter, Backspace, Tab, Shift, Caps Lock, Esc, Alt, Ctrl, Num Lock, Scroll Lock, Delete, Insert, SysRq, Print Screen, Home, Page Up, Page Down, End & windows Logo)

Mouse:

Mouse is an input device, which special scrolling ball. There are different              types of mouse as given below.

Base on model;

a)    Normal Mouse

b)    Optical Mouse

c)    Cord Less Mouse

Base on parts;

a)    Ps/2 port mouse

b)    USB port mouse

Scanner:

Scanner is an input device, is used to convert document or images into binary       files which are stored and reproduced as exact duplicate images in the                   computer. 

 

PROCESSING DEVICES

CPU:

Central Processing Unit, or in short the CPU, is the core processor of the Computer, and computes all that is requested. It is the brain of the computer, and its speed in measured in Hz (hertz) the faster CPU, is the faster processing power.

  RAM:
 Random Access Memory or commonly know as RAM, is like the number   of working hands in computer.

 

HARD DISK DRIVE:
It is a Secondary Memory Device. The storing data are express in bytes 
capacity.

Nowadays 80 GB, 160 GB, 320 GB…. 1000 GB data stores devises are available in the         market.

 MOTHERBOARD:

As the terms suggests is the coordinator of the computer which houses all the elements of

the computer, including the CPU, RAM, connections to Storage devices, Input and Output

devices. 

VGA:

Video Graphic Adapter, which is built on the motherboard, in which case it shares memory from RAM. The other form is when it is present independently on a card and can be inserted in one of the available empty slots on the motherboard.

SOUND CARD:

Sound card is a device used to play music, voice on the computer or for recording through a micro phone through its input and output ports.

           OUTPUT DEVICES

 Monitor:

Monitor is an output device. All the instructions are output by monitor. There two types

monitor.

   a)    CRT color monitor

   b)    LCD color monitor

   c)    LED color monitor

Diagram of monitor. 

 PRINTER:

Printer is a device attached to a Computer used to take output of the executed request on any Printable material such as paper/transparence/cloth etc.

 

SPEAKER:

Speaker is a device through which one can hear sound played by the computer. These require a sound card.

 THE END