This document discusses the classification and features of functional styles in English. It identifies five main styles: belles-letters, publicist, newspaper, scientific, and official. Each style has distinct substyles and serves different functions. Belles-letters focuses on aesthetics and cognition, while publicist aims to influence public opinion. Newspaper summarizes information concisely. Scientific language strives for precision and objectivity, and official language uses standardized expressions. The document also notes characteristics of vocabulary, syntax, and tone within each functional style.