| Acronym | Meaning |
| PM | Particulate Matter |
| PPPA | Poison Prevention Packaging Act |
| DCPBH | Double-channel Planar Buried Heterostructure |
| IPOD | International Phase Of Ocean Drilling |
| TPP | Triphenyl Phosphate |
| PROX | Preferential CO Oxidn. |
| OSWER BBS | OSWER Electronic Bulletin Board System (see CLU-IN) |
| MB-SAPT | Many-body Symmetry-adapted Perturbation Theory |
| ABI | Automated Ball Indentation |
| ROV | Remotely Operated Vehicle |