| Acronym | Meaning |
| IPIECA | International Petroleum Industry Environmental Conservation Association |
| PIRG | Public Interest Research Group |
| IUAM | Independent United Atom Model (in Positron Scattering By Mols.) |
| ACCDPPA | Approx. Coupled Cluster With Double Excitations Polarization Propagator Approxn. |
| DIERS | Design Institute For Emergency Relief Systems (AIChE) |
| SSE | Spinless Salpeter Equation |
| SWVP | Scattered Wave Variational Principle |
| PAW | Projector Augmented-wave [ab-initio Method] |
| XNBR | Carboxylated Nitrile Rubber |
| LCPA | Local Coherent Potential Approximation |