- ZAK stands for Zentrum für Angewandte Kulturwissenschaft und Studium Generale (German: Centre for Cultural and General Studies)
- ZAK stands for Zero Administration Kit (Microsoft)
- ZAK stands for Zghazagh Azzjoni Kattolika (Maltese: Youth Catholic Action; Malta)
- ZAK stands for Zjednoczenie Apostolstwa Katolickiego (Polish: Unification of the Catholic Apostolate; Poland)
- ZAK stands for Zukunft Ausbildung Karriere (German: Future Career Education)
- ZAK stands for Zipper Sterile-Alpha-Motif Kinase
ZAK