MAK may refer to:

• MAT Macedonian Airlines
• Maschinenbau Kiel, German industrial company now part of Vossloh; made railway locomotives
• Maktab al-Khidamat, the forerunner to al-Qaeda
• Mouvement pour l'autonomie de la Kabylie, a political organization in Algeria
• Multiple activation key, a type of activation key for Microsoft Windows
• Museum für angewandte Kunst Wien, Museum of Applied Arts, Vienna
• Museum für angewandte Kunst, Museum of Applied Arts, Frankfurt
• Caterpillar Marine Power Systems
• Magyar Autoklub (Hungary), a member of the FIA
• Interstate Aviation Committee also known as MAK

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