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• A computer is an electronic device,operating under the control of instructions stored in its own memory.
• A computer contains many electric, electronic,and mechanical components known as hardware.
• Input device
• Output device
• System unit
• Storage device
• Communication device

• Advantages of using computer
• Speed
• Reliability
• Consistency
• Storage
• Communications
• Disadvantages of using computer
• Health risk
• Violation of privacy
• Public safety
• Impact on labor force
• Impact of Environment

Networks and the Internet

• A network is a collection of computers and devices connected together,often wirelessly,via communications devices and transmission media.
• The internet is a worldwide collection of networks that connects millions of businesses,government agencies,educational institutions and individuals.
• The reason of use the internet:
• Communicate
• Research and access information
• Shop
• Bank and invest 
• Online trading
• Entertainment
• Download videos
• Share information
• Web application
• A social networking web site encourages members to share their interests,ideas, stories, photos, music, and videos with other registered users.