Designing and consulting user experience (UX)
UX briefly describes the behaviors, attitudes and feelings of a user about the use of a specific product, system, or service. The user experience covers the applied, experienced, emotional, meaningful and valuable aspects of human-computer interaction and product ownership. Additionally, a person's perception of a variety of aspects of a system, such as usefulness, ease of use, and efficiency, is also within the scope of user experience. In other words, user experience is the memory of a user using the product, system, or service.
Donald Arthur Norman: The user experience includes all aspects of the user interactivity with the company, its products and services.
Jesse James Garrett: The user experience is in a way that is behaved in a real world with a product.