“Clipper is a computer programming language that is used to create software programs that originally operated primarily under DOS. Although it is a powerful general-purpose programming language, it was primarily used to create database/business programs.”
Read more at the Clipper Wikipedia page.
This is a very “mature” product but seems to have some legs left. It was originally a compiled version of Ashton/Tates Dbase. A PC based product. Since it was a programming language and database system it could be used for management of any data. FoxPro is another product from the same development tree.