Revision for computer science

Revision for computer science

1. CPU and BIOS

   • CPU
     • Central processing unit "brains" of the computer
       • responsible for executing a sequence of instructions called a program
         • this program will take inputs from an input device, process the input in some way and output the results to an output
   • BIOS
     • basic input output system
       • the basic firmware that is embedded in the computer ROM chip used to start the computer

2. storage devices

   • ROM
     • read only memory
   • RAM
     • random access memory