The compilation of NBB statistics is explained for each statistical domain. This includes such things as information about the source data, conceptual standards, estimation methods and available publications, supplemented with useful methodological links. Companies that supply the Bank with data for statistical processing will find the Classification of Products by Activity (CPA) here, as well as the classification of institutional sectors (CIS) to which economic units belong. In addition, identification codes for securities (ISIN) are given here.