This document defines common medical instruments used to take vital signs such as temperature, blood pressure, pulse rate, respiratory rate, weight, and height. It identifies thermometers, blood pressure cuffs, watches or clocks, scales, and pulse oximeters as the tools to measure temperature, blood pressure, pulse rate, respiratory rate, weight, and pulse oximetry. It also describes the functions of stethoscopes, thermometers, blood pressure cuffs, pulse oximeters, scales, watches, and height/weight scales when examining patients.