There are more native speakers of Sino- Tibetan languages than of any other language family in the world. Our records of these languages are among the oldest for any human language, and the amount of active research on them, both diachronic and synchronic, has multiplied in the last decades. This volume covers the better-described languages, but with comments on the subgroups in which they occur. Ine addition to a number of modern languages, there ares on the descriptions of several ancient languages.