OTK may refer to: Organisations. Austrian Tourist Club (German: Österreichische Touristenklub or ÖTK) Obrona Terytorium Kraju (ISO 639:otk), territorial defense forces of Poland. Obchodní tiskárny Kolín, Czech paper and card manufacturers. One True King, a gaming organization based in Austin, Texas. Other meanings. Technical Control Department (Russian: Отдел технического контроля or ОТК) Old Turkic (language code) One time key, a method related to encryption. Otakuthon, Montreal's anime convention. Ottakring, the 16th municipal district of Vienna. Over-the-knee boots ("OTK boots")
https://en.wikipedia.org/wiki/OTK