This document discusses electrical fundamentals and units of measurement. It covers: 1) The seven base SI units including the meter, kilogram, second, ampere, kelvin, mole, and candela. 2) Derived units that are calculated from the base units, such as velocity, acceleration, force, torque, pressure, electrical charge, voltage, resistance, energy, work, and power. 3) Conventions for writing units, such as using a space between numbers and units, clustering numbers over 999 into groups of three, and including leading zeros for decimal values.