The System unit

The System unit

1. Types

   • Desktop
     • Tower unit
     • All on one
   • Laptops
     • two in one
     • Gaming
     • Ultrabooks
   • Tablets
     • mini tablets
   • smart phones
   • Wearables

2. Components

   • Personal computers come in a variety of different sizes, shapes, and capabilities. While they look different and each has its own unique features, they share surprisingly similar components, including system boards, microprocessors, and memory.
   • System board
     •      Also known as the mainboard or motherboard.    Controls communications for the entire computer system.   Acts as a data path and traffic monitor, allowing the various components to communicate efficiently with one another.    All components and devices connect to the system board.   
     • sockets
     • chips
     • bus lines
     • slots
   • microprocessor
     • Control unit
     • Arithmetic-logic unit (ALU)
   • Memory
     • RAM
     • ROM
     • Flash Memory
   • Expansion Slots and Cards
     • Graphics cards
     • Network interface cards (NIC)
     • Wireless network cards.
     • SD cards
   • Bus lines
     • Expansion buses
       • Universal serial bus (USB)
       • FireWire
       • (PCIe)
     • system buses
   • ports
     • Standard Ports
       • Universal serial bus (USB)
       • High Definition Multimedia Interface (HDMI)
       • Thunderbolt
       • High Definition Multimedia Interface (HDMI) ports
     • Specialized Ports
       • External Serial Advanced Technology Attachment (eSATA)
       • Musical instrument digital interface (MIDI)
       • Mini DisplayPort (MiniDP or mDP)
       • VGA (Video Graphics Adapter) and DVI (Digital Video Interface)
       • FireWire
     • Cables
   • Power Supply
   • Electronic Data and Instructions
     • Numeric Representation
     • Character Encoding
       • ASCII
       • EBCDIC
       • Unicode