| Abbreviation | Definition |
|---|---|
| QD | Quotient Difference |
| QE | Quadratic Equation |
| QED | Quod Erat Demonstrandum (in Latin) it has been proved/shown |
| QF | Quadrat Frei |
| QF | Quadratic Form |
| QF | Quadratic Function |
| QFD | Quadratic Finite Difference |
| QFEM | Quadratic-Finite-Element Method |
| QFT | Quick Fourier Transform |
| QGCM | Quadratic Guaranteed Cost Matrix |
| QI | Quadrics Intersection |
| QI | Quarter Integer |
| QI | Quasi-Inverse |
| QIR | Quadratic Integral Ratio |
| QKM | Quadratic Kohn Method |
| QKP | Quadratic Knapsack Problem |
| QL | Quantities of Large .... |
| QLR | Quandt Likelihood Ratio |
| QM | Quantitative Methods |
| QMC | Quadratic Matrix Constraint |