CALL refers to computer-assisted language learning, where tutors use tools to assist language learning similarly to a teacher, while CMC is an emerging area within CALL involving computer-mediated communication. Effective CALL provides learner autonomy, motivation, feedback, and interactivity, but may have limitations from a lack of resources or anti-social behavior. Developing successful CALL requires designing effective programs and evaluating them through collaboration between linguists, teachers, and software engineers.