| Acronym | Definition |
|---|
| RG | Radio Grade (as in RG-11 coaxial cable) |
| RG | Range (Canada Post road designation) |
| RG | Reading (postcode, United Kingdom) |
| RG | Rio Grande (railroad; river) |
| RG | Red Green |
| RG | Renseignements Generaux (French Investigation Bureau) |
| RG | Varig (Brazilian South Airways) |
| RG | Rechnung (German: Invoice) |
| RG | Right Guard (football) |
| RG | Residential Gateway |
| RG | Rupert Grint (actor) |
| RG | Regulatory Guide |
| RG | Rate Group |
| RG | Register-Guard (Eugene, OR newspaper) |
| RG | Raygun |
| Rg | Roentgenium (element) |
| RG | Radius of Gyration |
| RG | Ragusa, Sicilia (Italian province) |
| RG | Radio Guide (cable designator) |
| RG | Registro Geral (General Register, Brazilian ID card) |
| RG | Readiness Group |
| RG | Rock Guitar |
| RG | Regional Gathering (Mensa's regional group annual meeting) |
| RG | Republican Guard (Iraq; military) |
| RG | Rail Gun (Quake weaponry) |
| RG | Remote Gateway |
| RG | Ramat Gan (Israel) |
| RG | Retractable Gear |
| RG | Registered Geologist (Missouri registration for professional geologist) |
| RG | Ring Gear (automotive) |
| RG | Rio Group |
| RG | Res Gestae (Latin: Accompishments, epigraphy) |
| RG | Reduction Gear |
| RG | Regular Guys (radio show) |
| RG | University of Rio Grande (Rio Grande, Ohio) |
| RG | Ryan Giggs (soccer player) |
| RG | Random Glucose |
| RG | Reconnaissance Group |
| RG | Reliability Growth |
| RG | Red Guards (Chinese cultural revolution) |
| RG | Receiver Group |
| RG | Reactor Grade (plutonium) |
| RG | Rights Working Group |
| RG | Rules Girl (from "The Rules" books) |
| RG | Retro-Grade |
| RG | Rapid Gaming |
| RG | Rely-Guarantee |
| RG | Rate of Germination |
| RG | Reserve Grade |
| RG | Rough Grade (construction) |
| RG | Relational Geometry |
| RG | Re-Gummed (philately) |
| RG | Radio Direction Finding Station |
| RG | Roving Guns (gaming clan) |
| RG | Reports Generator |
| RG | Risk Guideline |
| RG | Regular-Graded |
| RG | Recommended Gear |
| RG | Robbins-Gioia Inc (program management company) |
| RG | Rail Garrison |
| RG | reconstitution group (US DoD) |
| RG | Reach Guide (baseball) |
| RG | Revalor G (cattle hormone) |
| RG | RatchetGamers (Ratchet and Clank forum) |
| RG | Ramped Gradient |
| RG | Renormalizaton Group |
| RG | US Revenue Silver Tax (Scott Catalogue prefix; philately) |