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.
It was Apple co-founder, Steve Jobs who directed Apple's engineers to develop a touch screen, mobile phone. Jobs at first was considering an Apple tablet computer, that desire eventually manifested in the iPad, and Apple had already produced a palm device with a touch screen, the Newton MessagePad.