1. Mean
1.1. A computer is an electronic device, operating under the control of instructions stored in its own memory
2. Network
2.1. A network is a collection of computers and devices connected together, often wirelessly, via communications devices and transmission media
3. Internet
3.1. Mean
3.1.1. The Internet is a worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals
3.2. Using
3.2.1. Communicate
3.2.2. Research and Access Information
3.2.3. Shop
3.2.4. Bank and Invest
3.2.5. Online Trading
3.2.6. Entertainment
3.2.7. Download Music
3.2.8. Share Videos
3.2.9. Web Application
4. Computer Usage
4.1. Home User
4.1.1. Personal financial management
4.1.2. Web access
4.1.3. Communications
4.1.4. Entertainment
4.2. Small Office/Home Office User
4.2.1. Look up information
4.2.2. Send and receive e-mail messages
4.2.3. Make telephone calls
4.3. Mobile User
4.3.1. Connect to other computers on a network or the Internet
4.3.2. Transfer information
4.3.3. Play video games
4.3.4. Listen to music
4.3.5. Watch movies
4.4. Power User
4.4.1. Work with multimedia
4.4.2. Use industry-specific software
4.5. Enterprise User
4.5.1. Communicate among employees
4.5.2. Process high volumes of transactions
4.5.3. Blog
5. Components
5.1. Input Device
5.1.1. Allows you to enter data and instructions into a computer
5.2. Output Device
5.2.1. Hardware component that conveys information to one or more people
5.3. System Unit
5.3.1. Case that contains the electronic components of the computer that are used to process data
5.4. Stroage Device
5.4.1. Holds data, instructions, and information for future use
5.5. Communications Device
5.5.1. Enables a computer to send and receive data, instructions, and information to and from one or more computers or mobile devices
6. Advantages
6.1. Speed
6.2. Reliability
6.3. Consistency
6.4. Storage
6.5. Communications
6.6. reducing the electricity consumed and environmental waste generated
7. Disadvantages
7.1. Health Risks
7.2. Violation of Privacy
7.3. Public Safety
7.4. Impact on Labor Force
7.5. Impact on Environment
8. Software
8.1. Come From
8.1.1. A programmer develops software or writes the instructions that direct the computer to process data into information
8.2. Install
8.2.1. Installing is the process of setting up software to work with the computer, printer, and other hardware
9. Categories
9.1. Personal computers
9.1.1. A personal computer can perform all of its input, processing, output, and storage activities by itself
9.2. Mobile computers
9.2.1. Personal computer you can carry from place to place
9.3. Mobile devices
9.3.1. Computing device small enough to hold in your hand
9.4. Game consoles
9.4.1. A game console is a mobile computing device designed for single-player or multiplayer video games
9.5. Mainframes
9.5.1. A mainframe is a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously
9.6. Supercomputers
9.6.1. A supercomputer is the fastest, most powerful computer
9.7. Embedded computers
9.7.1. An embedded computer is a special-purpose computer that functions as a component in a larger product