This document provides an overview of the linguist Michael Halliday and his development of systemic functional linguistics. It discusses Halliday's background and influences, including J.R. Firth. Halliday viewed language as a social semiotic, focusing on its functions in context. He identified seven basic functions of language that children acquire. The document also compares Halliday's views to Chomsky's, noting that Halliday saw grammar as reflecting functional uses of language rather than an innate universal grammar. In concluding, it thanks the reader for their patience and hopes they learned something from the presentation.