The Handbook of Special Education in Key Terms serves as a reference work positioned between a concise lexicon and a multi-volume manual. Its primary aim is to provide a handy source of information for studying and professional practice, serving as an introduction to the scientific areas of responsibility and fields of action based on selected central terms. The selection of these terms initially focused on the educational scientific integration of the fundamental concepts of special education, thereby establishing special education as a sub-discipline of educational science. The organization of the focal points of education for disability and disadvantage follows the recommendations of the Conference of Ministers of Education regarding special educational support, which states that these focal points should not categorize individuals by types of disability.