NATURAL is another proprietary fourth-generation language that is structured and less procedural than other conventional languages. It creates its programs in the system of the same name and can run them both interpretatively or executed as compiled objects. It was developed to work with Adabas, a database package that’s still widely used. 

Natural-language programming (NLP) is an ontology-assisted way of programming in terms of natural-language sentences, e.g. English.