Meter is the fundamental SI unit of length.

Milli is the SI unit prefix denoting 10 -3.

Mole is the fundamental SI unit of amount of substance.

Nibble is a unit of information.

Quadrant is a unit multiplier.

RightAngle is a unit multiplier.

SiderealSecond is a unit of time.

Siemens is the derived SI unit of electric conductance.

SI[expr] converts expr to SI units (International System).

Steradian is a dimensionless measure of solid angle.