The document defines a computer as a machine that performs tasks under the control of a program. Computers have hardware components like the system unit, monitor, keyboard, and software programs. The system unit contains components like the motherboard, CPU, and hard disk that perform calculations, while input/output devices like keyboards, mice, and monitors are used to enter and display information. Common software programs include operating systems like Windows and office solutions like Microsoft Office.

1. Page: 1 Prepared by Mr. Sieng, Daravuth Copyright 2008

2. Definition Computer, machine that performs tasks, such as calculations or electronic communication, under the control of a set of instructions called a program. Programs usually reside within the computer and are retrieved and processed by the computer’s electronics. The program results are stored or routed to output devices, such as video display monitors or printers. Computers perform a wide variety of activities reliably, accurately, and quickly. Page: 2 Prepared by Mr. Sieng, Daravuth Copyright 2008

3. Using Administration Complex Calculating Making a big Data Entertainment Hospital Art Education Space Etc… Page: 3 Prepared by Mr. Sieng, Daravuth Copyright 2008

4. Components of Computer 1. Hardware System Unit, Monitor, Keyboard, Mouse, Speaker, Scanner, Printer, Joystick, etc. 2. Software Programs - Microsoft Windows, Microsoft Office, Adobe Photo Shop, Macromedia Flash, etc. Page: 4 Prepared by Mr. Sieng, Daravuth Copyright 2008

5. Hardware System Unit : Calculating, Analyzing data,… Motherboard ( Main board ), CPU, Hard Disk, RAM, etc. Input Device : Keyboard, Mouse, Scanner, Barcode Reader, etc. Output Device : Monitor, Printer, etc. Monitor : Displaying information on screen. Normal Monitor Normal Screen Flat Screen LCD Monitor XGA Screen WXGA Screen Other Screen Page: 5 Prepared by Mr. Sieng, Daravuth Copyright 2008

6. Software Programs : Used for user solution. Microsoft Windows ( Operating System ) Microsoft Office ( Office Solution ) Multimedia Graphic Animation Game Etc… Page: 6 Prepared by Mr. Sieng, Daravuth Copyright 2008

7. Equipments of Computer Keyboard Mouse Monitor Joystick Scanner Camera Printer System Unit Page: 7 Prepared by Mr. Sieng, Daravuth Copyright 2008

8. History of Computer Page: 8 Prepared by Mr. Sieng, Daravuth Copyright 2008

9. History of Computer Page: 9 Prepared by Mr. Sieng, Daravuth Copyright 2008

10. History of Computer Page: 10 Prepared by Mr. Sieng, Daravuth Copyright 2008

11. History of Computer Page: 11 Prepared by Mr. Sieng, Daravuth Copyright 2008

12. History of Computer Page: 12 Prepared by Mr. Sieng, Daravuth Copyright 2008

13. Personal Computer ( PC ) Page: 13 Prepared by Mr. Sieng, Daravuth Copyright 2008