Pc hardware

Pc hardware

1. system unit

   • houses electronic components that make up the computer system
     • microprocesser
       • controls and manipulates data to produce information
     • memory
       • holding area for information,instructions and data
       • RAM
         • holds data being processed and program
           • temporary
   • Data
     • unprocessed facts that can be used as input for SU when stored
       • Document
         • created by word processers to save documents
       • presentation files
         • created by presentation graphic programs to save presentation materials
       • Database
         • created by database management programs to contain highly-structed and organized data
       • worksheets
         • created by electronic spreadsheet programs to analyze things

2. input/output

   • input
     • translates data that humans understand into a form the computer understand
   • output
     • processed data into form a human can understand

3. communication

   • communicating with another computer through the internet
   • modem:modifies audio,video into form that can be transmitted

4. secondary storage

   • holds data and program afte system is off
     • programs and large data
   • used laser to store data and programs
     • CD
       • DVD
       • BD
   • uses rigid metallic platters, write/read heads that move across it
     • data is stored by magnatic charges
   • less power/more reliable
     • not volatile but saves electronically similar to Ram
     • no moving parts

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