The inventory card file is a description of the collection of documents from the early days of the ITS. In contrast to the general inventory, the entries are not sorted chronologically by receipt of the documents, but rather by topic. They also include information about the source of the document, the places and nationalities that are mentioned, as well as the time periods covered. In this respect the inventory card file was used as a finding aid. The “Wartime Documents” inventory card, which was run until 1951, is particularly comprehensive.