| Acronym | Meaning |
| UNESCO | United Nations Educational |
| DIAL | Differential Absorption Lidar (laser Radar Sensing) |
| IBAE | Ion Beam Assisted Etching |
| ODLTS | Optical Deep Level Transient Spectroscopy |
| BSA | Breathing-sphere Approxn. (for Inelastic Mol. Collisions) |
| LEPS | London-Eyring-Polanyi-Sato (potential-energy Surface) |
| CGCC | Coal Gasification/combined Cycle |
| UQCISD | Unrestricted Quadratic Ci (with) Single (and) Double (excitations) |
| CLRC | Central Laboratory Of The Research Councils |
| GCW | Groundwater Circulation Well |