| 531-1/-9 | Special auxiliary subdivision for mechanics |
| 531.1 | Kinematics. Mathematical-mechanical geometry of motion |
| 531.2 | Statics. Forces. Equilibrium. Attraction |
| 531.3 | Dynamics. Kinetics |
| 531.4 | Work. Weight. Mass. Friction. Passive resistance |
| 531.5 | Gravity. Gravitation. Pendulums. Ballistics |
| 531.6 | Mechanical energy. Conservation of mechanical energy |
| 531.7 | Measurement of geometric and mechanical quantities: instruments, methods and units |
| 531.8 | Theory of machines. Technical mechanics in general |
