Skeuomorphism

A skeuomorph is a derivative object that retains ornamental design cues from structures that are necessary in the original. In simple words, skeuomorphism enforces the UIs to be designed to look like the original object of the real world and behave in that way too. Many computer programs have a skeuomorphic graphical user interface that emulates the aesthetics of physical objects.

An example of this trend was the 1998 RealThings package. A more extreme example is found in many music synthesis and audio processing software packages, which closely emulate physical musical instruments and audio equipment. Functional input controls like knobs, buttons, switches and sliders are often careful duplicates of those found on the original physical device being emulated. Some software even include graphical elements of the original