This document provides an overview of phonology, discussing its key concepts and units of analysis. It defines phonology as the study of sound patterns in language and identifies its three major units as segments, syllables, and features. It examines topics such as minimal pairs, contrastive sounds, allophones, and phonotactics. It also discusses language-specific variations and how sounds that contrast in one language may not in another. Overall, the document provides a concise introduction to fundamental concepts in phonological analysis.