This document provides an overview of several social science disciplines, including linguistics, political science, psychology, and sociology. It discusses the key branches and concepts within each discipline. For linguistics, it describes the main branches of phonetics, phonology, morphology, syntax, semantics, and pragmatics. It also provides examples to illustrate concepts within these branches. The document similarly outlines the focuses and examples for political science, psychology, and sociology. It notes influential early thinkers in each field like Ferdinand de Saussure for linguistics, John Locke for political science, Wilhelm Wundt for psychology, and Auguste Comte for sociology.