“Our concern is with language learning. We cannot simply assume that describing and exemplifying what people do with language will enable someone to learn it. If that were so, we would need to do more than read a grammar book and a dictionary in order to learn a language. A truly valid approach to ESP must be based on an understanding of the processes of language learning”

(HUTCHINSON & WATERS, 1987, p.14)

According to Hutchinson and Waters (1987), the subject of their book is: