A technology is transparent when the interface does not hinder the task it is being used for in any way. The medium does not interfere with the content, it allows the user to look through the medium rather than look at the medium itself. A good user interface is transparent when it is intuitive-- when the user instantly understands what must be done to perform the desired task. A technology is transparent when it allows a task to be performed "as the user would expect", i.e. without specialized knowledge of how to operate the technology. Transparency in technology is especially good for helping people become familiar with it; yet when an author wants to encourage thinking about the medium itself (see escher effect), transparency may be a burden. [m-w online]