What is mean by copybook? Where it is used? Why it is used?
[Answer]: A copybook is a section of re-usable code, written in a high-level programming language or assembly language, that can be copied (from a master) and inserted into several different programs (or multiple places in a single program). It is often used to define the physical layout of program data, pieces of procedural code and prototypes.
Is this the right answer. Is there anything which is required to be added.