JOI
| Acronym | Definition |
|---|---|
| JOI | Jerk Off Instructions |
| JOI | Jewish Outreach Institute |
| JOI | Java Objects by Interface |
| JOI | Japan Institute for Overseas Investment (est. 1991) |
| JOI | Joint Oceanographic Institutions, Inc. |
| JOI | Journal of Immunology |
| JOI | Joinville, Santa Catarina, Brazil - Federal (Airport Code) |
| JOI | Joehnk Interior (Design) |
| JOI | Justification Of Investment |