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Computer system (Internet concepts (Internet, World Wide Web (WWW),…

- - - - Multi-core processors
      - Clock speed
      - Bus width
  - - - Memory
        
        Volatile memory
        
        Non-volatile memory
        
        Random access memory (RAM)
        
        Read-only memory (ROM)
        
        EPROM (erasable programmable read-only memory)
        
        Cache memory
    - - Optical secondary storage
        
        CD-ROM
        
        Compact disc (CD)
        
        CD-R (CD-recordable)
        
        CDRW
        
        Digital versatile disc (DVD
- - - - Word processor, spreadsheet, database
  - - - Software as a Service (SaaS)