| Acronym | Meaning |
 | AAQS | Ambient Air Quality Standard (USEPA) |
 | PMC | Permanently Manned Capability (of Space Station) |
 | DRP | Dense Random Packing |
 | MECI | Monoexcited Configuration Interaction |
 | ICAO | International Civil Aviation Organization |
 | NAPPA | Nucleic Acid Programmable Protein Array |
 | CSML | Chemical Structure Markup Language |
 | RELMA | Remote Laser Microanalysis |
 | A/PI | Ab Initio Perturbed Ion (quantum Clacn. Method) |
 | PBZN | Peroxybenzoyl Nitrate |