| Acronym | Meaning |
| ORPA | Optimized Random Phase Approximation |
| ICOLC | International Coalition Of Library Consortia |
| DCS | Distributed Control System |
| PAGE | Policy Analysis Of The Greenhouse Effect |
| HFFR | Halogen-free Flame Retardant [thermoplastics] |
| LFC | Loss-free Counting |
| DOM | Dissolved Organic Matter |
| UNCED | United Nations Conference On Environment And Development |
| APS | Adiabatic Pseudopotential |
| TRI-US | Toxic Release Inventory-User Support |