This document discusses ESP (English for Specific Purposes) as an approach rather than a product. It makes three key points:
1) ESP is not about teaching specialized varieties of English, words, or grammar for specific areas. It is an approach to language learning, not a particular methodology or teaching materials.
2) ESP is based on analyzing the learner's needs and reasons for learning. All course design decisions regarding content and methods depend on understanding the learner's needs.
3) There is no single source of linguistic theory that ESP course design must draw from. Descriptions of language structure do not necessarily relate to how a language is learned. The approach is to understand the learner's situation and design instruction accordingly