Not invented here

Not Invented Here (NIH) is a term used to describe a persistent sociological, corporate or institutional culture that avoids using or buying already existing products, research or knowledge because of its different origins. It is normally used in a pejorative sense.

As a sociological phenomenon, "Not Invented Here" syndrome is manifested as an unwillingness to adopt an idea or product because it originates from another culture, a form of nationalism.

{{Wikipedia|Not Invented Here]]