RH
- Rh – (s) Rhodium
- RH – (s) Southern Rhodesia (ISO 3166 digram; obsolete 1980)
- RHIC – (i) Relativistic Heavy Ion Collider
- RHLI – (i) Royal Hamilton Light Infantry (Canadian militia regiment)
- RHO – (s) Southern Rhodesia (ISO 3166 trigram; obsolete 1980)
- RHS – (i) Right Hand Side – Redland High School – (a) Royal Horticultural Society – London
- RHU – (i) Replacement Holding Unit
- RHWR – (i) Radar Homing and Warning Receiver ("raw" for short)
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