Centimeter-Gram-Second system of units.
Lennard-Jones system of units, such that all quantities are made dimensionless with respect to a characteristic size (sigma), energy (epsilon) and mass.
Meter-Kilogram-Second system of units
Specifies a system of units.
System of units based on simulation units of Daltons, picoseconds, and Angstroms
etomica.units defines the Unit and Dimension classes.