acronym for Deutsches Institute fiir Normung. a national consensus standards-setting body in Germany.
Merriam-Webster Online Dictionary
din (noun)1.
a loud continued noise , especially a welter of discordant sounds
2.
a situation or condition resembling a din
intransitive verb
transitive verb
to make a loud noise
1.
to assail with loud continued noise
2.
to impress by insistent repetition - often used with into lessons dinned into us as children
German Industrial Standards
dinar
DIN (Wikipedia)

Head office of the German Institute for Standardization in Berlin-Tiergarten.
Deutsches Institut für Normung e.V. (DIN; in English, the German Institute for Standardization) is the German national organization for standardization and is the German ISO member body. DIN is a German Registered Association (e.V.) headquartered in Berlin. There are currently around thirty thousand DIN Standards, covering nearly every field of technology.