IPS
- AMSAT
- AeroSpace and Defence Industries Association of Europe
- Aerospace Industries Association
- Airlines for America
- Alphabetical list of file formats (F–L)
- Ford Dorsey Program in International Policy Studies
- I Promise School
- IPS Supported Employment
- IPS/UPS
- IPSS (disambiguation)
- Identity and Passport Service
- Image Packaging System
- In-plane switching
- Inch per second
- Indian Police Service
- Indianapolis Public Schools
- Indoor positioning system
- Induced pluripotent stem cell
- Industrial Promotion Services
- Industrial and provident society
- Insectivorous Plant Society
- Institute for Palestine Studies
- Institute for Policy Studies
- Institute for Politics and Society
- Institute for the Psychological Sciences
- Institute of Professional Sound
- Institutional protection scheme
- Instructions per second
- Inter Press Service
- Intermittent photic stimulation
- International Parliamentary Scholarship
- International Planetarium Society
- International Polarisation Scale
- International Primatological Society
- International Professional Surfers
- International Pyrotechnics Society
- Internet Provider Security
- Interoperable Instant Payment System
- Interplanetary Superhighway
- Intraparietal sulcus
- Introductory Physical Science
- Intrusion prevention system
- Inverse photoemission spectroscopy
- Investment policy statement
- Invision Power Services
- Ips (beetle)
- Ipswich railway station
- Iraqi Police Service
- Irish Prison Service
- Iron pipe size
- Israel Prison Service
- Lamella clarifier
- ROM hacking
- S-Series of ILS specifications
- The King of Queens
- Volvo Penta