This book discusses about: (1) the essence of human communication; (2) communication models; (3) communicative language ability; (4) communicative competence; (5) language learning and acquisition; (6) interlanguage development and language production process; (7) interlanguage communication strategies; (8) classsifying communication strategies; and (9) taxonomy of communication strategies; (10) the role of communication strategies in second language acquistion.