Most hanging systems are "suspended" systems. This means the weight of the object is suspended from the upper track, allowing the cable or rod to hang freely with gravity. The alternate type of hanging system is a "tensioned" system. Using this type of installation, the cable is also attached at a lower point, allowing the cable to be held taught, or tensioned, between the upper and lower points. This makes for a very stable display. While a suspended cable system is the most discrete, many think the engineered appearance of tensioned cable systems is what they prefer.