This Table helps you to convert the different Industry standards.
GOST: (russian: Государственный Стандарт (ГОСТ)/ State Standard
DIN: (german: Deutsche Industrie Norm) / German Industry Standard
ASA: American Standard Association
For example, if u own an old Soviet camera, the film (light meter) sensitivity is given in GOST. On some old German cameras, it could be DIN.
If you find your film sensitivity in degrees “°” eg. 27° which is 400 ASA, you can also use the DIN to convert into ASA/ISO values. Since DIN and degree ° have equal values.
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