The document discusses the origin and development of English for Specific Purposes (ESP). It begins by defining ESP as a subset of English for academic or employment purposes focused on specific vocabularies and skills. It then summarizes the history of ESP in four periods from its early focus on science/technology English after World War II to its future emphasis on variety in topics, contexts, methodologies, and critiques. Next, it outlines characteristics of ESP like being designed for adults, focusing on intermediate skills, and expecting basic fluency. Finally, it discusses benefits like accelerated learning through context, effective job application of terminology, and increased productivity from better preparation to communicate.