Usability, just common term used in today’s age of “ User Revolution ?”. I suppose we have already covered the stage where user used the philosophy to use the internet just to mark its presence on the new digital world.
As User Revolution stage came in the dynamic pages for interaction between sellers and buyers, companies, .com, e-commerce web sites and such came into being in a billion versions. However, this phase also resulted in complicated and very expensive websites. Just a good looking design was not enough to get enough visitors on your site. Which created a rift between the designers and User-ability Analysts, as they both are driven by different set of philosophy.