Der Spiegel -- Abbreviations Explained: How to Read the NSA Documents --- NOFORN, SIGDEV, WHARPDRIVE: Intelligence services are fond of code names and abbreviations. This glossary helps explain important terms. -- BfV -- Federal Office for the Protection of the Constitution. This is Germany's domestic intelligence agency and it cooperates closely with the NSA. In addition to the federal office, there are state offices in each of Germany's 16 states, all of which work closely with the BfV. -- BND -- The Bundesnachrichtendienst, Germany's foreign intelligence agency. It cooperates closely with the NSA, particularly on counter-terrorism. -- Boundless Informant -- This NSA computer program generates heat maps displaying the amount of metadata the NSA has at its disposal at any given time and can be sorted by country. The display is color coded, with green indicating a lower amount of data and red showing a high amount. -- BSI -- The Federal Office for Information Security. Once a part of the BND, this agency works under the auspices of Germany's Interior Ministry. It is responsible for the protection of government networks, among other duties. -- More, http://www.spiegel.de/international/world/glossary-of-nsa-abbreviations-a-975930.html