This document discusses the linguistic concepts of langue and competence as proposed by Ferdinand de Saussure and Noam Chomsky respectively. It defines langue as the abstract rules and conventions of a sign system that exists independently of individuals, while competence refers to the internalized linguistic knowledge of native speakers. The key similarities are that both discuss language as a system and are stable and abstract. The main differences are that langue has a social context versus the psychological context of competence, and langue exists prior to individuals while competence exists within their minds.