70Fxx | 70E | 70 | 70G |
| 70F05 | Two-body problems |
| 70F07 | Three-body problems |
| 70F10 | n-body problems |
| 70F15 | Celestial mechanics |
| 70F16 | Collisions in celestial mechanics, regularization |
| 70F17 | Inverse problems |
| 70F20 | Holonomic systems |
| 70F25 | Nonholonomic systems |
| 70F35 | Collision of rigid or pseudo-rigid bodies |
| 70F40 | Problems with friction |
| 70F45 | Infinite particle systems |
| 70F99 | None of the above, but in this section |