In telecommunications and computer networking, a subinterface is a division of one physical interface into multiple logical interfaces.

Optionally, layout managers can implement LayoutManager2, which is a subinterface of LayoutManager.

StyledDocument (an interface) A Document subinterface.

For example, by convention all general-purpose collection implementations (which typically implement some subinterface of Collection like Set or List) have a constructor that takes a Collection argument.

Cisco's IOS software maintains one IDB for each hardware interface in a particular Cisco switch or router and one IDB for each subinterface.

The JComboBox methods that change the items in the combo box's menu, such as insertItemAt, work only if the data model implements the MutableComboBoxModel interface (a subinterface of ComboBoxModel).