06.30.-k Measurements common to several branches of physics and astronomy
- 06.30.Bp Spatial dimensions (e.g., position, lengths, volume, angles, and displacements)
- 06.30.Dr Mass and density
- 06.30.Ft Time and frequency (1)
- 06.30.Gv Velocity, acceleration, and rotation
- 06.30.Ka Basic electromagnetic quantities (see also 84.37.+q Measurements in electric variables)