- Data – Data is any collection of numbers, characters or other symbols that has been coded into the format that can be input a computer and processed. Data on its own has no meaning e.g. Data of birth.
- Information – Information is processed data e.g. age.
- Instructions – An instruction is an order/ command given to the computer processor by a computer programme. At the lowest level each instruction is a sequence of zero’s and one’s that describes a physical operation that a computer need to perform. E.g. addition, subtraction. Depending on the type of instruction the data of these instructions is stored in a special storage area called registors. This instruction once processed could be stored in the memory of the computer.
In a computer assembler language each statement corresponds to single processor instruction. In higher level language, a language statement generally results after programme compilation in multi processor instructions.