| Acronym | Meaning |
| ITT | Impact Transition Temperature |
| RPS | Reemitted Positron Spectroscopy |
| CITAC | Cooperation On International Traceability And Analytical Chemistry |
| NBR | Nitrile-butadiene Rubber |
| QTST | Quantum Transition State Theory |
| INS | Ion Neutralization Spectroscopy |
| OPEC | Organization Of Petroleum Exporting Countries |
| ARGOS | Automatically Represents Graphics Of Chemical Structures |
| NITEP | National Incinerator Testing And Evaluation Program (Canada) |
| IGS | Intergenic Spacer |