The German Institute for Norms (Deutsches Institut für Normung – DIN) sets voluntary standards for material and immaterial things.

DIN norms are suggested typically by German industry. They are set only when all parties to the discussion are in agreement. DIN norms are to Germany what ISO and EN norms are to international and European industry respectively.

The first DIN norm was set in March of 1918. By 1927 the Germans had settled on more than 3,000 norms. In 1948 the number reached 8,200. As of 2012 there are over 33,000 DIN norms, most of which are in the areas of mechanical engineering, construction, air and space, information technology, environmental protection, optics and professional services.

Each year produces roughly 2,000 new DIN norms. Each and every norm is reviewed every five years as to whether it is necessary and or meets current standards. The DIN system has begun the process of integrating itself with European and international standardization systems.