In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Q: Modular programming is a way of organizing a computer program into smaller parts called modules .
A: 
Modular programming is a software design technique that emphasizes separating the functionality of a program into independent , interchangeable modules , such that each contains everything necessary to execute only one aspect of the desired functionality .