COMPUTERS

COMPUTERS

1. Main parts of a computer system

   • Hardware
     • constitutes the physical elements that make up a computer
   • software
     • consist of programs, instructions and algorithms, all of wich are defined as the logic elements that a computer needs in order to perform the tasks assigned to it

2. Computer architecture

   • Internal devices
     • CPU
       • central microprocessor
       • ALU
       • CU
     • Computer Memory
       • Second Memory
         • save data and information (USB
       • Main Memory = RAM
         • operating system and running programs are loaded onto it
     • Connection ports for peripherals
   • External devices
     • Peripherals
       • Input Peripherals
         • Send data to the computer
           • Keyboard
           • Microphone
           • Mouse
           • Graphic Tablet
           • Scanner
       • Output peripherals
         • Receive data from the computer
           • Monitors
           • Printers
           • Speakers

3. Computer connections

   • buses to interconect all the devices
   • data buses
   • address buses
   • control buses

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