This is the first book to survey the growing field of research known as corpus annotation. The computer corpus has become a central resource in the study of language, and it is increasingly seen as essential to annotate a corpus linguistically in order to successfully extract information from it. This is not only a practical task, but it also provides new insight into the nature of language and the most effective means of analyzing it. The text offers an introduction to the field and presents important research carried out by the University Centre for Computer Corpus Research on Language team at Lancaster University, that will be of interest to those already involved in corpus annotation.