| Acronym | Meaning |
 | IOW | Integrated Optical Waveguide |
 | ESEM | Electron Spin Echo Modulation |
 | CNDO/SW | Complete Neglect Of Differential Overlap / Sichel-Whitehead |
 | IBSCA | Ion Beam Spectrochemical Analysis |
 | LSW | Localized Spherical Wave (in Electronic Structure Calcns.) |
 | TDP | Total Dissolved Phosphorus |
 | BCSLN-HL(N) | Bardeen-Cooper-Schrieffer-Lipkin-Nogami-Heitler-London(n) (n Is Nth-order MBPT Starting From The Self-consistent HL Model) |
 | ESR | Electron Spin Resonance |
 | IWW | Industrial Wastewater |
 | SUMP | Spin-constrained Unrestricted Moeller-Plesset |