This is the first volume of a study of Panini`s work, its antecedents and the traditions of interpretation and analysis to which it gave rise. This revised second edition included the text of Panini`s Astadhyayi with indications of changes that were introduced to this text and a discussion concerning such changes. Subsequent volumes take up in full detail issues of interpretation, method, and theory associated with the Astadhyayi. This first volume is meant to provide a basic for such detailed discussions.