- ZOO stands for Compressed File (File Name Extension)
- ZOO stands for Zakon o Obveznim Odnosima (Croation: Law on Obligations)
- ZOO stands for Zone of Opportunity (housing cooperative; Montreal, Canada)
- ZOO stands for Zoologically Obsessed Octogenarian (Kids Next Door show)
- ZOO stands for Zone of Oddities (online game)
ZOO