IPO (disambiguation)
- IPO
- IPO model
- IPO station
- Immersion pulmonary oedema
- Independent Party of Oregon
- Instituto Português de Oncologia
- Intellectual Property Office (disambiguation)
- Intellectual Property Organisation of Pakistan
- Intellectual Property Owners Association
- Interdecadal Pacific oscillation
- International Philosophy Olympiad
- International Police Organization
- International Progress Organization
- Internationale Prufungsordnung
- Interprocedural optimization
- Israel Philharmonic Orchestra
- Schutzhund