Input 
Processing 
output 
storage 


Everything we tell the computer is Input.


Types of input
Data means the raw facts given to the computer.
Programs are sets of instructions that direct the computer.
Commands are special codes or key words that the user inputs to perform a task, RUN “ACCOUNTS”
These can be selected from a menu of commands like “Open” on the file menu. They may also be chosen by clicking on a command button.
User response is the user’s answer to the computer’s questions, such as choosing OK, YES, or NO or by typing in text, for example the name of a file.


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