In the course of his career, Professor Halliday has continued to address the issue of the application of linguistic scholarship for computational and quantitative studies. The sixth volume in the collected works of Professor M.A.K. Halliday includes works that span the last five decades, covering such topics as machine translation: the early years; and probabilistic grammar. The last section of this volume includes discussion of recent collaborative efforts bringing together those working in systemic functional grammar, fuzzy logic and "intelligent computing," engaging in what Halliday refers to as computing with meaning. The Collected Works of M.A.K. Halliday is a series that brings together Halliday's publications in many branches of linguistics, both theoretical and applied (a distinction which he himself rejects), including grammar and semantics, discourse analysis and stylistics, phonology, sociolinguistics, computational linguistics, language education and child language development.