computer

1. Disadvantages of Using Computers

1.1. Health Risks

1.2. Violation of Privacy

1.3. Public Safety

1.4. Impact on Labor Force

1.5. Impact on Environment

2. People use the Internet for

2.1. Communicate

2.2. Research and Access Information

2.3. Shop

2.4. Bank and Invest

2.5. Online Trading

2.6. Entertainment

2.7. Download Music

2.8. Share Videos

2.9. Web Application

3. hardware

3.1. Input Device

3.2. Output Device

3.3. System Unit

3.4. storage device

3.5. Communication Device

4. Advantages of Using Computers

4.1. Speed

4.2. Reliability

4.3. Consistency

4.4. Storage

4.5. Communications

5. Mobile Computers and Mobile Devices

5.1. Notebook computer

5.2. Tablet PC

5.3. Smart phone

5.4. PDA

5.5. Handheld computer

5.6. Portable media player

5.7. Digital camera