| Acronym | Definition |
|---|
| II | 2 (Roman numeral) |
| II | Image(ry) Interpreter/Interpretation |
| II | Institutional Investor (investment magazine) |
| II | International Institute (various organizations) |
| II | Item Identification |
| II | Incident Investigation |
| II | Inventory Item |
| II | Interactive Investor |
| II | Illegal Immigrant |
| II | Ion Implantation |
| II | Institutional Infrastructure |
| II | Interval International |
| II | Image Intensifier (Passive Night Vision Usage) |
| II | Internet Infidels |
| II | Imposto de Importação (Brazil) |
| II | Intestinal Ischemia |
| II | Islamic Institute |
| II | Information Interoperability |
| II | Ikebana International |
| II | Inspection Instruction |
| II | Biremis (Latin: Biremes, epigraphy) |
| II | Interview and Interrogations |
| II | Interchangeable Item (US DoD) |
| II | Ice Imp (gaming) |
| II | Imus Institute |
| II | I Hear & I Understand |
| II | IcyIcy (band) |
| II | Information Indicator Digits (telecommunications) |
| II | Interim Isolated |
| II | Infinite Innovation Ltd (IT/Internet solution company) |