Any analysis of language, including 8th-grade grammar, can be called linguistics. As recently as 200 years ago, ordinary grammar was about the only kind of linguistics there was. Today a linguist may be a person who learns foreign languages, but the term usually refers to people who devote themselves to analyzing the structure of language. Many linguists concentrate on the history of a language; others study the way children learn to speak; others analyze the sounds of a language—and still others just study English grammar, a subject so big that you could easily spend your entire life on it.