Regeln für die alphabetische Katalogisierung

The Regeln für die alphabetische Katalogisierung or RAK (also known as Regeln der alphabetischen Katalogisierung, translating as: Rules for alphabetical cataloging) are a bibliographic cataloging set of rules. The RAK rules appeared for the first time in 1976 and became the dominant set of rules in Germany and Austria in the 1980s.

Source: Wikipedia — Regeln für die alphabetische Katalogisierung (CC BY-SA 4.0)