1. Inputting - It is the process of entering data and instructions into the computer system.

2. Storing - It is the process of saving data and instructions in the computer system so that they are readily available for initial or intermediary processing whenever required.

3. Processing - It is the process of performing arithmetic operations (such as addition, subtraction, multiplication, division, etc.) or logical operations (such as comparisons like less than, greater than, less than or equal to, greater than or equal to, equal to, not equal to, etc.) on data so that it can be converted into useful information.

4. Outputting - It is the process of producing useful information or results for the user such as a visual display on the screen or a printed report.

5. Controlling - It is the process of directing the method and sequence in which all of the above operations are performed in the computer system.