Computer System

Computer System

1. A computer is a device that can...

   • Receive data
     • Input hardware
       • Keyboard
       • Mouse
       • Buttons
   • Store data
     • Primary and secondary storage
   • Process data
     • Using a CPU
   • Output data
     • Output hardware
       • Printer
       • Monitor

2. Importance of computer systems

   • Safety
     • Monitoring and controlling nuclear reactions within nuclear power stations
   • Travel
     • Computers aid travel vary from satellite navigation to online ticket purchases to autopilots that help to fly planes
   • Business
     • Many people depend on computers to transfer funds and to search for manufacturer
   • Education
     • Computers can aid distance learning, and help to learn in a classroom. It can also be used to administer test, and maintating the pupils' grades
   • Retail
     • Computers connected to barcode makes shopping faster
   • Entertainment
     • Hand-held devices and desktop devices allow users to play games, read books, watch movies and listen to music
   • Communication
     • As well as emailing, computers facilitates forums, instant messaging, social networks, teleconferencing and videoconferencing

3. Standards

   • Open
     • Are publicly available and flexible, and a nyone can engage with it
   • Proprietary
     • Standarads defined by a company, like Microsoft
   • Industry
     • These are formally defined sets of standards that specify how hardware or software from different developers interact
   • De facto
     • De facto are standars that eveolve from what happens to work well such as QWERTY keyboard

4. Considerations

   • Legal
     • Copyright
     • Data protection act
     • Computer misuse act
     • Health and safety
   • Ethical
     • Digital Divide
       • Location
       • Money
       • Age
     • storing personal data
   • Environmental
     • E-waste
       • ecucling
     • Less transport
     • Less paper

5. Testing

   • Beta
   • Alpha

6. Reliability

   • AVAIL
   • MTTF

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