This document discusses multimeters, which are devices that measure voltage, current, resistance and other electrical properties. It defines a multimeter and identifies two main types: analog and digital. Analog multimeters use a needle to indicate readings, while digital multimeters use a digital display. The document explains the basic functions of multimeters, which include measuring voltage, current, resistance, capacitance and inductance. It then provides steps for properly using both analog and digital multimeters, such as selecting the correct measurement type and range.