Department of Computer Scien

ce and Information Engineering

National Cheng Kung University, TAIWAN

HANEL

INSIDE THE COMPUTERInternal Organization of Computers

‰CPU (Central Processing Unit)

¾Execute information stored in memory

‰I/O (Input/output) devices

¾Provide a means of communicating with CPU

‰Memory

¾RAM (Random Access Memory)

–

temporary storage of programs that computer is runningƒThe data is lost when computer is off¾ROM (Read Only Memory)

– contains

programs and information essential to operation of the computer ƒThe information cannot be changed by use, and is not lost when power is off

• It is called

nonvolatile memory