| Acronym | Definition |
|---|
| MOI | Ministry of Information (various locations) |
| MOI | Moment Of Inertia |
| MOI | Ministry of Investment (various locations) |
| MOI | Moment of Inspiration (3D modeling software) |
| MOI | Method of Instruction |
| MOI | Medium of Instruction (education) |
| MOI | Mothers of Invention (band) |
| MOI | Multiplicity of Infection |
| MOI | Molecules of Interest |
| MOI | Method of Implementation |
| MOI | Men of Integrity (ministry) |
| MOI | Method of Inspection (various companies) |
| MOI | Ministry of the Interior |
| MOI | Ministry of Industry (Vietnam) |
| MOI | Mechanism Of Injury |
| MOI | Mechanism of Injury (medical reports) |
| MOI | Mine of Information |
| MOI | Memorandum of Intent |
| MOI | Men of Issachar (ministry) |
| MOI | Memorandum of Information |
| MOI | Mars Orbit Insertion |
| MOI | Memorandum Of Instruction |
| MOI | Model Identification |
| MOI | Marine Officer Instructor |
| MOI | Mode of Inheritance (genetics) |
| MOI | Memorandum of Insurance |
| MOI | Mode of Infection |
| MOI | Multiple on Investment (finance) |
| MOI | Meteorological Organization of Iran |
| MOI | Minority Owned Institution |
| MOI | moiety of infection |
| MOI | Medical Optical Imaging |
| MOI | Maintenance Operating Instruction |
| MOI | Machine Operating Instructions |
| MOI | Message of Intent |
| MOI | Missing on Induction |
| MOI | Military Occupational Information |
| MOI | Manner of Infection |
| MOI | Modern Optical Instrumentation (China State Key Laboratory) |
| MOI | Mode of Inoculation |
| MOI | Most Outstanding Intern |
| MOI | Media of Inspection |
| MOI | Mitcham Orchestra Inc. (South Australia) |
| MOI | Machinery Operation Instruction |
| MOI | Model Operating Instruction |
| MOI | Manner of Inoculation |
| MOI | Message Of Operational Intent |
| MOI | Marketing Operations Interface |