| Acronym | Meaning |
 | HTMR | High Temperature Metal Recovery |
| GDMS | Glow Discharge Mass Spectrometry |
| PESC | Passivated Emitter Silicon Solar Cell |
| TRI | Toxic Release Inventory |
| MULAP | Mulliken Approximation |
| BLM | Bureau Of Land Management |
| GEOS | Goddard Earth Observing System |
| UNESCO | United Nations Educational |
| SCSAG | Small-curvature Semiclassical Adiabatic Ground-state (tunneling Approxn.) |
| STS | Space Transportation System |
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