They are designed to be similar to physical entities but also have their own properties (e.g., desktop metaphor and web portals).
Windows eventually overtook Apple in the PC market to become the predominant GUI-based operating system.
Continual technological improvement has made metaphors depict these real-world experiences more realistically to ultimately enhance interface performance.
Experts, on the other hand, understand what is going on with the technical aspects of an interface metaphor.
While the concept behind interface metaphors appears simple (to promote more efficient facilitation of a computer), a lack of empirical evidence exists to support these claims.