A collection of techniques for the planing and writing of programs that increases programmer productivity,e.g.,top-down programing and the use of loop,selection and sequence structures.

A portion of the computer in which data, instructions. and the results of processing can be stored.

A register is a special-purpose memory device in the computer. This location is the position in memory of the instruction following the call instruction.

There are three major function of the numbers and the gross pay. They are -
(a) Reading the data
(b) Processing it 
(c) Printing the result

Top down programming means techniques for planning a structured program in which the entire program is first broken down into three modules: 
(a) The processing that takes place before any data is processed.
(b) The processing of data and 
(c) The processing that takes place after all data records have been read.