| Acronym | Meaning |
| PDU | Process Development Unit |
| CERL | Corvallis Environmental Research Laboratory |
| GGG | Gallium Gadolinium Garnet |
| CBD | Cellulose-binding Domain |
| CERDIP | Ceramic Dual-inline Package |
| VD-RCC | Vibrational Diabatic-rotational Close-coupled (method In Mol. Collision Calcns.) |
| ECCS | Electro-coated Chromium Steel |
| DBPR | Microbiological And Disinfection Byproducts Regulations |
| CHA | Concept Hazard Analysis |
| TPEPICO | Threshold Photoelectron-photoion Coincidence |