**Mechanics** (Latin *mechanicus*, from the Greek *mechanikos*, "one skilled in machines") is a variety of specialised sciences pertaining to the functions and routine operations of machines, machine-like devices or objects. When preceded by a qualifier, mechanics refers to the study of empirically mechanical functions of a stated quantity or property.

- Acoustic theory
- Biomechanics: study of mechanical properties of biologically created structures.
- Continuum mechanics
- Fluid mechanics
- Lie group symmetries
- Mechatronics
- Newtonian physics = Classical Mechanics
- Quantum MechanicsApply functional analysis to quantum wave functions?
- Statistical mechanics
- Theory of relativity