The term interaction design was first coined by Bill Moggridge and Bill Verplank in the mid-1980s. It would be another 10 years before other designers rediscovered the term and started using it. To Verplank, it was an adaptation of the computer science term user interface design to the industrial design profession. To Moggridge, it was an improvement over soft-face, which he had coined in 1984 to refer to the application of industrial design to products containing software
User eXperience (UX) is the art of making complex products easy and fun to use. UX drives almost all the products that you use from aeroplanes to mobile apps. Companies such as Apple, Google, Yahoo, Microsoft, eBay, Audi, and LinkedIn attract and engage billions of customers because they invest in user experience. More simply put, a UX professional is like the architect that designs houses, where as a software engineer is like the civil engineer who uses the designs to construct the house.