COIF
| Acronym | Definition |
|---|---|
| COIF | Certificate of Initial Fitness (UK) |
| COIF | Charities Official Investment Fund |
| COIF | Cost of Incarceration Fee (once assessed to US federal prisoners) |
| COIF | Congenital Onychodysplasia of the Index Finger (dermatology) |
| COIF | Coalition on Online Identity Fraud (ITAA) |
| COIF | Combinatorial Output I/O Feedback |