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Introduction to Computers
by Kanyanat Meechareon 09/09/2010
Introduction to Computers
by Kanyanat Meechareon
1. A World of Computers
1.1. Computers are everywhere
2. What Is a Computer?
2.1. A "computer" is an electronic device, operating under the control of instructions stored in its own memory
2.1.1. Information Processing Cycle
2.1.1.1. Collects >> Processing >> Produces data information (input) (output)
3. The Components of a Computer
3.1. A computer contains many electric, electronic, and mechanical components known as "hardware"
3.1.1. Input Device
3.1.1.1. Allows you to enter data and instructions into a computer
3.1.2. Output Device
3.1.2.1. Hardware component that conveys information to one or more people
3.1.3. System Unit
3.1.3.1. Case that contains the electronic components of the computer that are used to process data
3.1.4. Storage Device
3.1.4.1. Holds data, instructions, and information for future use
3.1.5. Communications Device
3.1.5.1. Enables a computer to send and receive data, instructions, and information and from one or more computers or mobile devices
4. Advantages and Disadvantages of Using Computers
4.1. Advantage of Using Coputers
4.1.1. Speed
4.1.2. Reliability
4.1.3. Consistency
4.1.4. Storage
4.1.5. Communications
4.2. Disadvantages of Using Computers
4.2.1. Health Risks
4.2.2. Violation of Privacy
4.2.3. Public Safety
4.2.4. Impact on Labor Force
4.2.5. Impact on Environment
4.3. "Green computing" involves reducing the electricity consumed and environmental waste generated when using a computer
4.4. Strategies include : – Recycling – Regulating manufacturing processes – Extending the life of computers – Immediately donating or properly disposing of replaced computers
5. Networks and the Internet
5.1. A "network" is a collection of computers and devices connected together, often wirelessly, via communications devices and transmission media
5.2. The "Internet" is a worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals
5.3. People use the Internet for a variety of reasons
5.3.1. Communicate
5.3.2. Research and Access Information
5.3.3. Shop
5.3.4. Bank and Invest
5.3.5. Online Trading
5.3.6. Entertainment
5.3.7. Download Music
5.3.8. Share Videos
5.3.9. Web Application
5.4. A "social networking Web site" encourages members to share their interests with other registered users
6. Computer Software
6.1. "Software", also called a program, tells the computer what tasks to perform and how to perform them
6.1.1. System Software
6.1.1.1. Operating system
6.1.1.2. Utility program
6.1.2. Application Software
6.2. "Installing" is the process of setting up software to work with the computer, printer, and other hardware
6.3. A programmer develops software or writes the instructions that direct the computer to process data into information
7. Categories of Computers
7.1. Personal computers >> Mobile computers and mobile devices >> Game consoles >> Servers >> Mainframes >> Supercomputers >> Embedded computers
8. Personal Computers
8.1. A "personal computer" can perform all of its input, processing, output, and storage activities by itself
8.2. Two popular architectures are the PC and the Apple
8.2.1. Desktop computer
9. Mobile Computers and Mobile Devices
9.1. Mobile Computer
9.1.1. Personal computer you can carry from place to Computer
9.1.1.1. Notebook computer
9.1.1.2. laptop computers
9.1.1.3. Tablet PCs
9.2. Mobile Device
9.2.1. Computing device small enough to hold in your hand
9.2.1.1. smart phones
9.2.1.2. PDAs
9.2.1.3. handheld computers
9.2.1.4. portable media players
9.2.1.5. digital cameras
