Introduction to Computers
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1. Advantages and Disadvantages of Using Computers
1.1. Green computing involves reducing the electricity consumed and environmental waste generated when using a computer
1.1.1. Advantages of Using Computers
1.1.1.1. Speed
1.1.1.2. Reliability
1.1.1.3. Consistency
1.1.1.4. Storage
1.1.1.5. Communications
1.1.2. Disadvantages of Using Computers
1.1.2.1. Health Risks
1.1.2.2. Violation of Privacy
1.1.2.3. Public Safety
1.1.2.4. Impact on Labor Force
1.1.2.5. Impact on Environment
2. Computer Software
2.1. Software, also called a program, tells the computer what tasks to perform and how to perform them
2.1.1. System Software
2.1.2. Application Software
2.2. Installing is the process of setting up software to work with the computer, printer, and other hardware
2.3. A programmer develops software or writes the instructions that direct the computer to process data into information
3. Personal Computers
3.1. A personal computer can perform all of its input, processing, output, and storage activities by itself
4. Mobile Computers and Mobile Devices
4.1. Mobile Computers
4.1.1. Personal computer you can carry from place to place
4.1.1.1. Examples include notebook computers, laptop computers, and Tablet PCs
4.2. Mobile Device
4.2.1. Computing device small enough to hold in your hand
4.2.1.1. Examples include smart phones, PDAs, handheld computers, portable media players, and digital cameras
5. Supercomputers
5.1. A supercomputer is the fastest, most powerful computer
5.1.1. Fastest supercomputers are capable of processing more than one quadrillion instructions in a single second
6. Networks and the Internet
6.1. A network is a correction of computers and devices connected together, often wirelessly, via communications devices and transmission media
6.2. The Internet is a worldwide collection of networks that connects millions of businesses, government agencies, educational instructions, and individuals
6.2.1. People use the internet for a variety of reasons:
6.2.1.1. Communicate
6.2.1.2. Research and Access information
6.2.1.3. Shop
6.2.1.4. Bank and invest
6.2.1.5. Online Trading
6.2.1.6. Entertainment
6.2.1.7. Download Music
6.2.1.8. Share Videos
6.2.1.9. Web Application
6.2.2. A social networking web site encourages members to share their interests, ideas, stories, photos, music, and videos with other registered users
7. What is a Computer?
7.1. A computer is an electronic device, operating under the control of instruction stored in its own memory
7.1.1. Task
7.1.2. Prerequisites
7.2. Information Processing Cycle
7.2.1. Collects data(input) ---> Processing ---> Produces information(output)
8. The Components of a Computer
8.1. A computer contains many electric, electronic, and mechanical components known as hardware
8.1.1. Input Device
8.1.1.1. Allow you to enter data and instructions into a computer
8.1.2. Output Device
8.1.2.1. Hardware component that conveys information to one or more people
8.1.3. System Unit
8.1.3.1. Case that contains the electronic components of the computer that are used to process data
8.1.4. Storage Device
8.1.4.1. Holds data, instructions, and information for future use
8.1.5. Communications Device
8.1.5.1. Enables a computer to send and receive data, instructions, and information to and from one or more computers or mobile devices