| CIT | Clasical Irreversible Thermodynamics |
| DNA | Deoxyribonucleic Acid |
| DRT | Direct-RNA-Template theory for the code’s origin |
| EET | Excitation Energy Transfer |
| Ga | Giga (1000 million) years ago |
| NADH | reduced form of Nicotinamide Adenine Dinucleotide |
| NMR | Nuclear Magnetic Resonance |
| RNA | Ribonucleic Acid |
| RNPs | Ribonucleoprotein Particles |
| UV | Ultraviolet |
| UVB | Ultraviolet B 280–315 nm |
| UVC | Ultraviolet C 100–280 nm |
| UVTAR | enzymeless Ultraviolet and Temperature Assisted Replication mechanism |