Parnas's work was very influential and had a major effect on language design and software design, even (indirectly) on those who never heard of him. The trend b

Parnas's work was very influential and had a major effect on language design and software design, even (indirectly) on those who never heard of him. The trend before him was to write monsters where everything knew about everything and there wasn't clean separation between subsystems; if you read "The Mythical Man Month" you'll see that this was one of the problem with the IBM 370 operating system development.