Sentence:  Among the kinds of expressive vocabularies that a speaker or writer may employ are emotional, moral, religious, aesthetic, scientific, technical, logical, mathematical, natural language, and <WSD>constructed language</WSD> (such as programming language or indexing language) vocabularies. 
Meaning of the word marked with <WSD> tags:  Any language, whether a human language, a programming language or markup language, that is not a natural language.