| Acronym | Meaning |
| PILC | Pillar Interlayered Clays |
| NNLO | Next-to-next-to-leading Order |
| BCS | Bragg Crystal Spectrometer |
| GLC | Ground Level Concentration |
| MCM | Multichip Modules |
| NRA | National Rivers Authority (UK) |
| LLIT | Liq.-liq. Intermol. Transfer |
| MRSPT | Modified Rayleigh-Schroedinger Perturbation Theory |
| IBI | Index Of Biotic Integritypar |
| VHDL | Very High Speed Integrated Circuits (VHSIC) Hardware Description Language |