Each DP camp received a set of sequentially numbered DP 1 cards. These registration numbers were made up of a letter and eight numerals. The letter indicates the country in which the person was registered: A for Austria, B for Belgium, G for Germany, F for France, N for the Netherlands and W for Norway. These registration numbers were only issued once. On the DP 2 cards, this number is entered in the first field. The number is the same on all documents for a specific person; family members were given sequential numbers if possible.