There are at least two bands called ZAO, the first of which are still active, the latter haven't done anything since 1994: 1) Zao (pronounced /ˈzeɪ.oʊ/) is a band from Greensburg, Pennsylvania and are considered one of the founding metalcore groups. They did, however, begin in 1993 in Parkersburg, West Virginia, playing a style of Hardcore similar to bands such as Earth Crisis and Snapcase. Zao has hosted several musicians and endured numerous roster changes to the point where no original members remain, often marked by the departure and readmission of multiple members.

Read more about Zao on Last.fm.