 Hi! This introductory unit, probably your first contact with linguistics, introduces the central aspects of language and communication and defines the main branches of linguistics. The contact section discusses the differences between language and communication. We will look at human and animal communication systems and we will define the branches of linguistics. If you are not sure where to start, use the question set in the how to proceed section as guidance. The mastery test presents some introductory questions about language, communication and linguistics that are all discussed in the content units and should thus be easy to answer. Well, and in this unit suggestions for in-class activities, you will find numerous interesting linguistic phenomena ready for analysis. Try on your own first, the model suggestions will be given when necessary. And by the way, don't forget to tick off an activity once you have mastered it. So, even if this unit involves a lot of brand new information, we made it as accessible as possible for you. So, good luck!