The papers published in this volume were originally presented at the Third North American Symposium on Corpus Linguistics and Language Teaching held on 23-25 March 2001 at the Park Plaza Hotel in Boston, Massachusetts. Each paper analyses some aspect of language use or structure in one or more of the many linguistic corpora now available. The number of different corpora investigated in the book is a real testament to the progress that has been made in recent years in developing new corpora, particularly spoken corpora, as over half of the papers deal either wholly or partially with the analysis of spoken data. This book will be of particular interest to undergraduate and graduate students and scholars interested in corpus, socio and applied linguistics, discourse analysis, pragmatics, and language teaching.