| Acronym | Meaning |
 | SRA | Sudden Rotation Approximation |
 | IFAS | Integrated Fixed-film Activated Sludge |
 | RGA | Residual Gas Analysis |
 | AAAS | American Academy Of Arts And Sciences |
 | RSCPA | Reduced (second Order) Self-consistent Phonon Approxn. (a Green-function Calcn. Method) |
 | CAS-SCF | Complete Active Space SCF (a CI-type Method) |
 | PGR | Plant Growth Regulator |
 | SRIM | Structural Reaction Injection Molding |
 | HGTF | Hermite Gaussian-type Function |
 | AHSV | African Horsesickness Virus |