Design is planning for a piece of art. It may not be the physical piece, but it is what every piece of art begins with. It can be blueprints for a new building or a toy, or it can be how someone imagines a piece of art to be before he or she starts to make it. In short, it is a plan for the artwork.
Media is a form of communicating with people surrounding us. It tells people what type of person we are when we display something.
Technology deals with human as well as other animal species' usage and knowledge of tools and crafts, and how it affects a species' ability to control and adapt to its natural environment. The word technology comes from the Greek technología, the study of something, or the branch of knowledge of a discipline. A strict definition is elusive; technology can be material objects of use to humanity, such as machines, but can also encompass broader themes, including systems, methods of organization, and techniques. The term can either be applied generally or to specific areas: examples include "construction technology", "medical technology", or "state-of-the-art technology".
Art, design, media and technology means to combine all four to create something new, a form of art made with a meticulous design, created using technology.
Technology adapted from wikipedia.org.
Others with help from wikipedia.org.