The Scientific Committee on Antarctic Research (SCAR) together with the Council of Managers of National Antarctic Programs (COMNAP) is addressing data management issues through the Joint Committee on Antarctic Data Management (JCADM). JCADM comprises the manager of each National Antarctic Data Centre (NADC)2, and one nominee from each of SCAR, COMNAP and the Antarctic Master Directory host. JCADM has implemented an Antarctic Data Directory System (ADDS), endorsed by the XVIIIATCM, to make information about Antarctic scientific data readily available. The ADDS is composed of an Antarctic Master Directory (AMD) containing information on Antarctic scientific data, and a network of National Antarctic Data Centres (NADCs). The Scientific Committee on Antarctic Research (SCAR) together with the Council of Managers of National Antarctic Programs (COMNAP) is addressing data management issues through the Joint Committee on Antarctic Data Management (JCADM). JCADM comprises the manager of each National Antarctic Data Centre (NADC)2, and one nominee from each of SCAR, COMNAP and the Antarctic Master Directory host. JCADM has implemented an Antarctic Data Directory System (ADDS), endorsed by the XVIIIATCM, to make information about Antarctic scientific data readily available. The ADDS is composed of an Antarctic Master Directory (AMD) containing information on Antarctic scientific data, and a network of National Antarctic Data Centres (NADCs).