Contents: Revision of Phonetics; The Phonemic Prionciple; Alternations; Features, Classes & Systems; Problems with the Phonemic Principle; The Organisation of the Grammar; Abstractness & Ordering; Interlude: Post-SPE Phonology: Some Questions About the Standard Model; Naturalness in Generative Phonology; The Role of the Lexicon; Representations Reconsidered: Phonological Structure Above the Level of the Segment; Autosegmental Phonology; Representations & the Role of Rules.