When HIV arrived in Germany in the early 1980s, there was already a dynamic landscape of tradition, law and organisational structure shaping and re-shaping society’s response to social and health care problems. It is not the intent here to take on the impossible task of describing in one chapter the intricacies of this landscape. However, in these few pages an attempt is made to offer a schematic map which points out some of the important landmarks along the way, thereby making the following chapters more readable. This will be done by presenting a series of terms alphabetised by their English translations. Each term will be defined in its own right and as it relates to the other entries. The symbol –> indicates that the word immediately following has its own entry. In some instances, the term is discussed explicitly by the authors in this volume. Where this is the case, the corresponding chapters are noted at the end of the entry. The terms included here represent important underlying assumptions and traditions which have shaped the response to HIV in Germany.