Introduction To Computer System -1

A computer is an electronic device that can be instructed to perform calculation on numerical or to compile, store correlate other forms of information. Computers represent text, symbols and music as well as numbers.

A computer system is a combination of six elements:

1. Hardware

2. Software

3. Data/ information

4. Procedures

5. People

6. Communications

Components of a computer (Hardware)

1. Monitor                                  6. Floppy Disk

2. System Unit (CPU)                   7. Compact Disk (CD)

3. Keyboard                                8. Speakers

4. Mouse                                     9. Printer

5. Speakers                                 10. UPS

Software 

1. System Software

2. Application Software 

System Software

Window 98, Window XP, Window 7 etc...

Introduction To Computer System -2

Application Software 

 Word Processing     -        Microsoft Word

Spreadsheet           -        Microsoft Excel

Database                -        Microsoft Access

Presentation           -        Microsoft PowerPoint

Desktop Publishing  -        PageMaker 7.0

Graphic                  -        Corel Draw, Illustrator, Auto CAD, Adobe Photoshop CS3,... 

Programming                   -        C++ 

Using the Mouse

 

Single Click (Use Left or Right button)

Double Click (click simultaneously)

Dragging (Click the Left button and pressing drag the desired location and Release.)

Keyboard Sign

?                 -        Question Mark

“    ”            -        Quotation Marks

-, < , >      -        Relation Signs

,                  -        Comma

:                  -        Coloa

!                  -        Exclamation Mark

=                 -        Equal

/                  -        Slash

\                  -        Back Slash

Special Character (Non-Alpha or Non-Numeric Character)

@ , # , $ , % , * ,+