Basic computer organisation
- 2.  Inputting – The process of entering data and instructions into computer system.  Storing – Saving data instructions to make them readily available for initial or additional processing whenever required.  Processing – Performing arithmetic operations (add, multiply, subtract, divide, and etc.) or logical operations (equal to, less than, greater than, and etc.) on data to convert them into useful information.  Outputting – The process of producing useful information or results for the user such as a printed report or visual display.  Controlling – Directing the manner and sequence in which all of the above operations are performed.
- 4. ď‚— An input unit of a computer system performs the following functions: 1. It accepts (or reads) instructions and data from outside world. 2. It converts these instructions and data in computer acceptable form. 3. It supplies the converted instructions and data to the computer system for further processing.
- 5. ď‚— An output unit of a computer system performs the following functions: 1. It accepts the results produced by the computer, which are in coded form and hence, can not be easily understood by us. 2. It coverts these coded results to human acceptable form. 3. It supplies the converted results to outside world.
- 6. ď‚— The storage unit of a computer system holds (or stores) the following: 1. Data and instructions required for processing (received from input devices). 2. Intermediate results of processing. 3. Final results of processing, before they are released to an output devices.
- 7. ď‚— Control Unit of a computer system manages and coordinates the operations of all other components of the computer system. ď‚— Arithmetic Logic Unit of a computer system is a place where the actual executions of instructions takes place during processing operations.
- 8. ď‚— It is brain of a computer system ď‚— It is responsible for controlling the operations of all other units of a computer system.
- 9. ď‚— A system has following three characteristics: 1. A system has more than one element. 2. All elements of a system are logically related 3. All elements of a system are controlled in a manner to achieve the system goal. ď‚— A computer is a system as it comprises of integrated components that work together to perform the steps called for in the executing program.