1. A programming style that braks down program functions into modules, each of which accomplishes one function and contains all the source code and variables needed to accomplish that function. Modular programming is a solution to the problem of very large programs that are difficult to debug and maintain. By segmenting the program into modules that perform clearly defined functions, you can determine the source of program erros more easly. Object-orientated programming languages, such as SmallTalk and HyperTalk, incorporate modular programming principles. From QUECID