RMS stands for Root Mean Square, which is a mathematical term used in various fields. In mathematics, RMS is defined as the square root of the mean square of a set of numbers. In physics, RMS is used to describe the value of the direct current that dissipates the same power in a resistor as an alternating current. In audio engineering, RMS watts refer to the continuous power handling of a speaker or amplifier. The formula for calculating the RMS value of a set of n values is the square root of the arithmetic mean of the squares of the values. The RMS value is a measure of the effective or average value of a waveform, and it is commonly used in signal processing and electrical engineering. The Root Mean Square Error (RMSE) is a measure of the differences between predicted and observed values, and it is frequently used in estimation theory.