Introduce to Computer
作者：Eang ea
1. What is the computer?
1.1. A computer is an electronic device,operating under the control of instruction stored in its own memory.
2. Disadvantages of using computers
2.1. Health risks
2.2. Violation of privacy
2.3. Public safety
2.4. Impact on labor force
2.5. Impact on environment
3. Advantages of using computer
3.1. Speed
3.2. Reliability
3.3. consistency
3.4. Storage
3.5. communications
4. Categories of computers
4.1. Game consoles
4.2. Personal computer
4.3. Mobile computer and mobile devices
4.3.1. Note book computer
4.3.2. Tablet PC
4.3.3. Smart phone
4.3.4. PDA