The North American Industry Classification System (NAICS) is a numerical system that classifies business establishments by industry. This system is used by Federal statistical agencies for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy.nd although the NAICS code system is used more often today, the SIC system is still being used by some government bodies, including the Securities and Exchange Commission. NAICS industries are identified by a 6-digit code, in contrast to the 4-digit SIC code.
Trapezius Muscle. The trapezius is one of the major muscles of the back and is responsible for moving, rotating, and stabilizing the scapula (shoulder blade) and extending the head at the neck. It is a wide, flat, superficial muscle that covers most of the upper back and the posterior of the neck.
If you want tips on relieving trapezius muscle pain through better movement and posture, go to Trapezius Exercises. The trapezius is a broad triangular muscle which attaches to the base of the skull, and lies at the back of the neck, over the upper shoulders and extends down your upper back to your mid back.It is one of the most likely muscles to get sore knots or âtrigger pointsâ.rapezius Exercises. You can prevent and relieve pain in your trapezius muscles by exercising them. Exercise brings circulation to the muscles, and it relaxes them. Most importantly, if done correctly exercise will strengthen supporting muscles that support good posture.