| RNase P | Ribonuclease P |
| RNA | ribonucleic acid |
| tRNA | transfer RNA |
| pre-tRNA | precursor tRNA |
| P RNA | RNase P RNA |
| PRORP | protein-only (alternatively: proteinaceous) Ribonuclease P |
| MRPP | mitochondrial RNase P protein |
| NYN | Nedd4-BP1, YacP nuclease |
| PPR | pentatricopeptide repeat |