With the arrival of new wireless technology, and the massive use of handheld devices like PDAs, mobile phones or tablet PCs, the development of M-Learning applications has bloomed. Mobile Learning allows students to learn while traveling by public transportation, or while wandering in a park. This kind of learning involves a variety of technologies like internet for downloading the latest content or handheld keyboard for input. In this document the term Mobile Learning will be explained and all its uses and applications will be thoroughly reviewed.