ISM
- -ism
- Cologne trade fair
- ISM (album)
- ISM Canada
- ISM Racing
- ISM University of Management and Economics
- ISM band
- ISMS (disambiguation)
- Ian Standish Monteith Hamilton
- Idiopathic sclerosing mesenteritis
- Illinois State Museum
- Imperial Service Medal
- Implicit Shape Model
- Incorporated Society of Musicians
- Incredible Shrinking Man
- Independence Seaport Museum
- Independent Sacramental Movement
- Indian School of Mines
- Indian School, Muscat
- Industry Structure Model
- Inner Sydney Montessori School
- InstallShield
- Institute for Supply Management
- International Safety Management Code
- International School Moshi
- International School of Management (Paris)
- International Society for Micropiles
- International Solidarity Movement
- International Sports Management
- International Spy Museum
- International student ministry
- Interstellar medium
- Ism (band)
- Ism (film)
- Ism (name)
- Italian Social Movement
- Kissimmee Gateway Airport
- MUMPS
- The International School of Minnesota