1. What Is a Computer?
1.1. A computer is an electronic device, operating under the control of instructions stored in its own memory
2. Advantages and Disadvantages of Using Computers
2.1. Advantages of Using Computers
2.1.1. Speed
2.1.2. Reliability
2.1.3. Consistency
2.1.4. Storage
2.1.5. Communications
2.2. Disadvantages of Using Computers
2.2.1. Health Risks
2.2.2. Violation of Privacy
2.2.3. Public Safety
2.2.4. Impact on Labor Force
2.2.5. Impact on Environment
2.3. Green computing involves reducing the electricity consumed and environmental waste generated when using a computer
2.4. Strategies include
2.4.1. Recycling
2.4.2. Regulating manufacturing processes
2.4.3. Extending the life of computers
2.4.4. Immediately donating or properly disposing of replaced computers
3. Computer Software
3.1. Software, also called a program, tells the computer what tasks to perform and how to perform them
3.2. Installing is the process of setting up software to work with the computer, printer, and other hardware
3.3. A programmer develops software or writes the instructions that direct the computer to process data into information
4. Personal Computers
4.1. A personal computer can perform all of its input, processing, output, and storage activities by itse
4.2. Two popular architectures are the PC and the Apple
4.2.1. Desktop computer
5. Mobile Computers and Mobile Devices
5.1. Mobile Computer
5.1.1. Personal computer you can carry from place to place
5.1.2. Examples include notebook computers,laptop computers, andTablet PCs
5.2. Mobile Device
5.2.1. Computing device small enough to hold in your hand
5.2.2. Examples include smart phones,PDAs,handheldcomputers,portable media players, and digital cameras
5.3. Notebook computer
5.4. Tablet PC
5.5. Smart phone
5.6. PDA
5.7. Handheld computer
5.8. Portable media player
5.9. Digital camera
6. Game Consoles
6.1. A game console is a mobile computing device designed for single‐player or multiplayer video games
7. Embedded Computers
7.1. An embedded computer is a special‐purpose computer that functions as a component in a larger product
8. Examples of Computer Usage
8.1. Home User
8.1.1. Personal financial management
8.1.2. Web access
8.1.3. Communications
8.1.4. Entertainment
8.2. Small Office/Home Office User
8.2.1. Look up information
8.2.2. Send and receive e‐mail messages
8.2.3. Make telephone calls
8.3. Mobile User
8.3.1. Connect to other computers on a network or the Internet
8.3.2. Transfer information
8.3.3. Play video games
8.3.4. Listen to music
8.3.5. Watch movies
8.4. Power User
8.4.1. Work with multimedia
8.4.2. Use industry - specific software
8.5. Enterprise User
8.5.1. Communicate among employees
8.5.2. Process high volumes of transactions
8.5.3. Blog
9. A World of Computers
9.1. Computers are everywhere
10. The Components of a Computer
10.1. A computer contains many electric, electronic, and mechanical components known as hardware
10.1.1. Input Device
10.1.1.1. Allows you to enter data and instructions into a computer
10.1.2. Output Device
10.1.2.1. Hardware component that conveys information to one or more people
10.1.3. System Unit
10.1.3.1. Case that contains the electronic components of the computer that are used to process data
10.1.4. Storage Device
10.1.4.1. Holds data, instructions, and information for future use
10.1.5. Communications Device
10.1.5.1. Enables a computer to send and receive data, instructions, and information to and from one or more computers or mobile devices
11. Networks and the Internet
11.1. A network is a collection of computers and devices connected together, often wirelessly, via communications devices and transmission media
11.2. The Internet is a worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals
11.3. People use the Internet for a variety of reasons
11.3.1. Communicate
11.3.2. Research and Access Information
11.3.3. Shop
11.3.4. Bank and Invest
11.3.5. Online Trading
11.3.6. Entertainment
11.3.7. Download Music
11.3.8. Share Videos
11.3.9. Web Application
11.4. A social networking Web site encourages members to share their interests, ideas, stories, photos, music, and videos with other registered users
12. Categories of Computers
12.1. Personal computers
12.2. Mobile computers and mobile devices
12.3. Game consoles
12.4. Servers
12.5. Mainframes
12.6. Supercomputers
12.7. Embedded computers
13. Servers
13.1. A server controls access to the hardware, software, and other resources on a network
13.1.1. Provides a centralized storage area for programs, data, and information
14. Mainframes
14.1. A mainframe is a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously
15. Supercomputers
15.1. A supercomputer is the fastest, most powerful computer
15.1.1. Fastest supercomputers are capable of processing more than one quadrillion instructions in a single second