1. can performs all input, processing, output and storage activities by itself
2. What is a computer ? An electronic device, operating under control of instruction
3. advantages of using computers
3.1. speed
3.2. Reliability
3.3. Consistency
3.4. Storage
3.5. Communication
4. information processing cycle collect data(input)-> processing->produces information(output)
5. provides a centralized storage area for programs, data, and information
6. Disadvantages of using computers
6.1. Health risk
6.2. violation of privacy
6.3. Public safety
6.4. Impact on Labor force
6.5. Impact on environment
7. Elements of an information system
7.1. Software
7.2. Data
7.3. People
7.4. Procedures
7.5. Hardware
8. Computers 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 cells
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 users
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. computers applications in society
9.1. Education
9.2. Finance
9.3. Government
9.4. Health care
9.5. Science
9.6. publishing
9.7. travel
9.8. manufacturing
10. Categories of Computers
10.1. Dekstop
10.1.1. dekstop computers
10.1.2. personal computers (input,processing,output and storage activities by itself)
10.2. Game consoles
10.2.1. a mobile computing device designed for single-player or multiplayer video games
10.3. Servers
10.3.1. controls access to hardware, software and other resources on network
10.4. Mainframes
10.4.1. large expensive, powerful computers that can handle hundreds or thousands of connected users simultaneously
10.5. Supercomputers
10.5.1. fastest, most powerful computers
10.5.2. capable of processing more than one quadrilion instructions in a single
10.6. Embedded computers
10.6.1. special-purpose computer that functions as a component in a larger product
10.6.1.1. consumer electronics
10.6.1.1.1. mobile and digital telephones
10.6.1.1.2. digital telivisions
10.6.1.1.3. cameras
10.6.1.1.4. video recorders
10.6.1.1.5. DVD Players and recorders
10.6.1.1.6. Answering machines
10.6.1.2. home automation devices
10.6.1.2.1. thermostats
10.6.1.2.2. sprinkling system
10.6.1.2.3. security monitoring systems
10.6.1.2.4. appliances
10.6.1.2.5. lights
10.6.1.3. automobiles
10.6.1.3.1. antilock brakes
10.6.1.3.2. engine control modules
10.6.1.3.3. airbag controller
10.6.1.3.4. cruise control
10.6.1.4. process controllers and robotics
10.6.1.4.1. remote monitoring systems
10.6.1.4.2. power monitors
10.6.1.4.3. machine controllers
10.6.1.4.4. medical devices
10.6.1.5. computer devices and office machines
10.6.1.5.1. keyboards
10.6.1.5.2. printers
10.6.1.5.3. faxes
10.6.1.5.4. copiers
10.7. Mobile computers
10.7.1. personal computer that can carry from place to place
10.7.2. examples: notebooks computers, laptop computers etc
10.8. mobile devices
10.8.1. computing device small enough to hold in your hand
10.8.2. smartphones, e-book readers, handheld computers, digital cameras and portable media players