These eighteen original essays pay tribute to Morris Halle, Institute Professor of Linguistics and Philosophy at MIT. Halle's impact on the study of language has been enormous; he and his students represent a continuous and coherent tradition which is unique in modern linguistics. Although they range from poetry to phonetics, the contributions share the common method of formal phonological analysis which reflects Halle's own work. With the exception of Roman Jakobson, his teacher, all of the contributors are Morris Halle's PhD students. Contributors include Roman Jakobson, Samuel J. Keyser, Paul Kiparsky, Sanford A. Schane, Arnold M. Zwicky, James W. Harris, Stephen R. Anderson, Elisabeth Selkirk, William R. Leben, Shosuke Haraguchi, Mark Liberman, Janet Pierrehumbert, Alan S. Prince, John Goldsmith, Jill Carrier Duncan, Joan Mascaro, John J. McCarthy, Bruce Hayes, Rochelle Lieber, and Moira Yip.