fundamental concepts of processing unit

CPU 

Input devices „ Allows people to supply information to computers ,

Output devices „ Allows people to receive information from computers ,

Arithmetic calculations are performed using the Arithmetic/Logical Unit or ALU „,

Control unit decodes and executes instructions , Arithmetic operations are performed using binary number system .

Memory Unit store data / instructions .

The program counter (PC) holds the memory address of the next instruction Fetch the instruction to which the PC points. Increment the PC Execute the fetched instruction

Receive information for processing „

Return the results of processing „ 

Store information Accessories that allow computer to perform specific tasks. „

Store information Common input and output devices „ Speakers, Mouse, Scanner, Printer, Joystick,CD-ROM, „ Keyboard ,Microphone, DVD  etc.