Difference between " AES " and " RMS " power of a driver.

What is the difference between AES and RMS power of a driver?
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I think I think AES stands for Audio Engineering Socity, but I have never seen this listed as a wattage specification. RMS means Root Mean Square, and is used to denote the “average” power indication for sine wave. This value normalizes the wattage to something closer to the DC equivelant value of the AC wave which naturally rises and falls whereas DC would be steady state. Basically shows a more real world comparison value for power output. 
Ok, AES3 (also known as AES/EBU) is a standard for the exchange of digital audio signals between professional audio devices... AES3 was jointly developed by the Audio Engineering Society (AES) and the European Broadcasting Union (EBU). In laymans terms, AES/EBU connections are 3-pin connections for balanced cables. If you want to read up on balanced vs unbalanced, here is a good article - http://www.clarkeaudio.com/article_balance.htm

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. RMS power is derived from Root Mean Square which is a statistical measurement of the magnitude of a varying quantity and is applied to voltage or current.
RMS power is erroneous term.  RMS voltage multiplied by RMS current gives AVERAGE (and not RMS) power.  For sinewave average power is equal half of peak power (there is such thing as RMS power but has different value and does not represent anything useful).