• Computer derived compute 
• Computer mean calculator 
• Electronic device 
• Solve problem according to the set of instruction 

Definition: Computer word was derived in compute and computer mean calculation. The computer is an electronic device. It can solve any kind of problem according to the set of instructions (software). The fundamental working of the computer can take input from the user then process it and produce useful information(output) Application: Printing books Calculating and preparing bills Security alarm system.

Application:

• Printing books 
• Calculating and preparing bills 
• Security alarm system