The direction of a correlation is either positive or negative. In a negative correlation, the variables move in inverse, or opposite, directions. In other words, as one variable increases, the other variable decreases. For example, there is a negative correlation between self-esteem and depression. In other words, the higher your self-esteem, the lower your feelings of depression.
Excel Communications was founded in 1988 by Dallas entrepreneur Kenny Troutt as a long distance reseller in the US telecom sector at the birth of telecom deregulation.
Apple's iPad is a revolutionary product that is cratering the PC industry. But it wasn't Steve Jobs' idea. A full decade before Jobs launched the iPad in 2010, Bill Gates launched Microsoft's touch input tablet computer. Two years later, Gates showed up with an improved model, a color tablet.