: An interface that duplicates functionality
provided by some other interface.
Doorknobs that can be turned clockwise
to open the associated door
In Windows, being able to close an application by clicking on the X, selecting file|close, pressing alt-f4 or selecting End Task from the Close Program dialog.
Frequently, redundant interfaces are taken for granted
. Despite this, many people
will violently oppose creation
of a redundant interface. It is my belief
that redundant interfaces allow
people to choose the interface that seems most natural to them.