The document provides an overview of structural linguistics and the Prague School. It discusses key figures such as Roman Jakobson, Nikolay Trubetzkoy, and Ferdinand de Saussure. Some of the main contributions of the Prague School included analyzing language in terms of functions, distinguishing phonology from phonetics, and establishing methods for phonological analysis. Jakobson proposed a model of communication with six elements. Trubetzkoy defined the phoneme and developed the concept of distinctive features. De Saussure introduced the concepts of the sign, signifier, signified, langue and parole.