| RII | Radio Islam Indonesia 
| Others |
| RII | Ramah Israel Institute
| Others |
| RII | Rebar Installation Instructions
| Others |
| RII | Recruiters International Inc
| Others |
| RII | Red Inmobiliaria Internet
| Others |
| RII | Region II
| Others |
| RII | Regional Indicators Initiative
| Others |
| RII | Relative Index of Inequality
| Others |
| RII | Remote Ignition Interrupter
| Others |
| RII | Remote Ignition Interupter
| Others |
| RII | Request for Intelligence Information
| Others |
| RII | Required Inspection Item
| Others |
| RII | Required Inspection Items
| Others |
| RII | Research Imaging Institute
| Others |
| RII | Research Industry Index
| Others |
| RII | Research Infrastructure Improvement
| Others |
| RII | Research Innovations Inc
| Others |
| RII | Resource Innovation Institute
| Others |
| RII | Resources And Infrastructure Industry
| Others |
| RII | Retail Integration Institute
| Others |
| RII | Retirement Investing Institute
| Others |
| RII | Rhode Island Internet
| Others |
| RII | Risk Informed Inspection
| Others |
| RII | Routing Information Identifier
| Others |
| RII | Routing Information Indicator
| Others |
| RII | Routing Information Indicator bit
| Others |
| RII | Russell Industries, Inc.
| Others |