the main components of a computer system

the main components of a computer system

1. what is the cpu

   • brain of the computer
   • responsible for calculations and stuff
   • the speed of the cpu is measured in giga hertz where one giga hert is equivalent to 1 billion instructions that can be carried out per second

2. main memory

   • the secondary storage
   • where are applications stored
     • they are stored in the secondary memory
   • cache
     • cache is the fastest type of memory
       • it is located between the processer and the ram
         • It transfers the next set of data from the ram into the cache
   • what is the ram
     • ram means random acess meroy it is a temporary data in which the applications and operating sytems are stored
   • what is the rom?
     • rom means read only memory
     • rom is a built in memeory that cannot be changed
     • the rom has a special feature known as the boot up sysem which is used to start the computer
     • ro m is non volatile memory whcih means data is not lost when the computer is turned off

3. input devices /outp0ut devices

   • input devices include keyboard mouse
   • output devices include printerrs,monitors,
   • an input device is one which can pass data into the computer
   • an output device is one whcih takes data from the computer

4. backing storage

   • a synonym for backing storage would be secondary storage
   • this is where users tend to make copiies of original files
   • backing storage is non -volatile which means that data cannot be lost when the computer is turned off.