| Acronym | Meaning |
| ACR | Advanced Cracking Reactor (for Ethylene Production From Petroleum) |
| ASA | Acrylonitrile-styrene-acrylate Terpolymer |
| MLE | Maximum Likelihood Estimate |
| ROA | Relaxed Orbital Approximation |
| HDMR | High-dimensional Model Representation |
| A/CNK | [Al2O3/(CaO + Na2O + K2O)] (Shand's Index) |
| LSI | Large-scale Integration |
| LCI-SCSCFMO | Limited Configuration Interaction Single-configuration SCF MO |
| RAS | Reflection-absorption Spectroscopy |
| LASCS | Light-activated Silicon Controlled Switch |