What does DIN stands for?

DIN refers to a standardized radio/stereo size for vehicles (large enough to accept a CD). 1 DIN is the standard DIN specification. 2 DIN or double DIN refers to units that are twice as high as the standard DIN, half DIN is half high as 1 DIN.

International standard ISO 7736 defines a standard size for car audio head units. The standard was originally established by the German standards body Deutsches Institut fur Normung (The German to English translation is:

"German Institute for Standardization"), and is therefore commonly referred to as the "DIN car radio size". It was adopted as an international standard in 1984.

Head units generally come in either single DIN (1 DIN), which is 50 mm high; or double DIN (2 DIN), which is 100 mm high.

In skiing DIN refers to the setting of the binding i.e. which torque that is needed to make the ski boot come loose from the binding. The abbreviation comes from the same German institute as described above.