IMU is an international non-governmental and non-profit scientific organization, with the purpose of promoting international cooperation in mathematics. It is a member of the International Council for Science (ICSU) and has endorsed repeatedly ICSU's Principle of Freedom, Responsibility & Universality of Science.
More precise objectives and detailed Information about the organization of IMU can be found in its statutes (and of course in the IMU server that you are currently visiting). Legally, IMU is an unincorporated association, recognized as a charitable organization by the internal revenue service of Berlin, Germany (Finanzamt Berlin-Charlottenburg). Ongoing activities concerning IMU are published inIMU Bulletins and in the bimonthly newsletter to which everybody can subscribe.