This document discusses the origins and birth of English for Specific Purposes (ESP). It traces how ESP emerged from the post-war growth of technology and commerce, which generated demand for an international language. As English became the dominant language in these fields, new learners sought to acquire English skills for specific professional reasons. Events like the 1970s Oil Crisis further commercialized English learning. ESP then developed to meet the precise language needs of various occupations and professions by designing content and teaching methods based on learners' goals.