| ROI | Office Interiors 
| Others |
| ROI | R Optimization Infrastructure
| Others |
| ROI | Racing On Interstates
| Others |
| ROI | Radical Online Initiative
| Others |
| ROI | Radio One, Inc.
| Others |
| ROI | Radius Of Influence
| Others |
| ROI | Range Of Interest
| Others |
| ROI | Range Operating Instruction
| Others |
| ROI | Rate Of Improvements
| Others |
| ROI | Rate Of Income
| Others |
| ROI | Rate Of Increase
| Others |
| ROI | Rate Of Injection
| Others |
| ROI | Rate Of Interest
| Others |
| ROI | Rational Organisational Investment
| Others |
| ROI | Raving On Israel
| Others |
| ROI | Rdma Over Internet
| Others |
| ROI | Reactive Oxygen Intermediate
| Others |
| ROI | Realization, Organization, and Intelligence
| Others |
| ROI | Really Outrageous Interpretation
| Others |
| ROI | Record Of Initiative
| Others |
| ROI | Record Of Invention
| Others |
| ROI | Region Of Interest
| Others |
| ROI | Regions Of Interest
| Others |
| ROI | Registration Of Interest
| Others |
| ROI | Release Of Information
| Others |
| ROI | Relevance Originality Impact
| Others |
| ROI | Remote Operator Interface
| Others |
| ROI | Removal Of Implant
| Others |
| ROI | Report Of Investigation
| Others |
| ROI | Republic Of India
| Others |
| ROI | Republic Of Ireland
| Others |
| ROI | Research On Investment
| Others |
| ROI | Results Oriented Instructors
| Others |
| ROI | Results, Opportunities, and Impacts
| Others |
| ROI | Return Of Ice
| Others |
| ROI | Return of Investment
| Others |
| ROI | Return On Information
| Others |
| ROI | Return On Innovation
| Others |
| ROI | Return On Integrity
| Others |
| ROI | Return On Internet
| Others |
| ROI | Return On Investment
| Others |
| ROI | Return Only Investments
| Others |
| ROI | Right On It
| Others |
| ROI | Risk Of Investment
| Others |
| ROI | Route Of Ingress
| Others |
| ROI | Rovaniemi Airport, Rovaniemi, Finland
| Others |
| ROI | Run On Ice
| Others |
| ROI | Rural Opportunities, Inc.
| Others |