| Meaning | Category |
| Andrews Murphy Airport, USA - NC | Regional->Airport Codes |
| Ramechap, Nepal | Regional->Airport Codes |
| Random Happening Program | Community->Educational |
| Re-Heat Pizza | Computing->Assembly |
| Regenerated Human Production | Medical->Human Genome |
| Relative Humidity - Percent | Miscellaneous->Unit Measures |
| Residential Housing Project | Miscellaneous->Unfiled |
| Retirement Housing Professional | Business->Positions |
| Right Hand Panel | Governmental->NASA |
| Right Handed Phenomenon | Community->Sports |
| Right Handed Pitcher | Community->Sports |
| Robert H Perry Yachts Designers, Inc. | Business->Firms |
| Rural Heritage Program, National Trust for Historic Preservation | Community->Non-Profit Organizations |
| Rural Hospital Program | Medical->Physiology Academic & Science->Universities |
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