- AAPU stands for Attleboro Auxiliary Police Unit (Attleboro, MA, USA)
- AAPU stands for airborne auxiliary power unit
- AAPU stands for Alumni Association of Princeton University
- AAPU stands for American Association of Pediatric Urology
- AAPU stands for Alumni Association of Panjab University (India)
- AAPU stands for Application Assistance Payment Unit (California)
- AAPU stands for aree di attuazione puntuale urbana
- AAPU stands for alt.arts.poetry.urban (newsgroup)
- AAPU stands for Automotive Auxiliary Power Unit
AAPU