Transparency (human–computer interaction)

Any change in a computing system, such as a new feature or new component, is transparent if the system after change adheres to previous external interface as much as possible while changing its internal behaviour. The purpose is to shield from change all systems (or human users) on the other end of the interface. Confusingly, the term refers to overall invisibility of the component, it does not refer to visibility of component's internals (as in white box or open system). The term transparent is widely used in computing marketing in substitution of the term invisible, since the term invisible has a bad connotation (usually seen as something that the user can't see and has no control over) while the term transparent has a good connotation (usually associated with not hiding anything). The vast majority of the times, the term transparent is used in a misleading way to refer to the actual invisibility of a computing process. Because of this misleading and counter-intuitive definition, modern computer literature tends to prefer use of "agnostic" over "transparent".

The term is used particularly often with regard to an abstraction layer that is invisible either from its upper or lower neighbouring layer.

Also temporarily used later around 1969 in IBM and Honeywell programming manuals the term referred to a certain computer programming technique. An application code was transparent when it was clear of the low-level detail (such as device-specific management) and contained only the logic solving a main problem. It was achieved through encapsulation – putting the code into modules that hid internal details, making them invisible for the main application.

For example, the is transparent, because it introduces the access to files stored remotely on the network in a way uniform with previous local access to a file system, so the user might even not notice it while using the folder hierarchy. The early (FTP) is considerably less transparent, because it requires each user to learn how to access files through an ftp client.

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