Abstract: The present disclosure relates to a plurality of host materials, an organic electroluminescent compound, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds according to the present disclosure as a plurality of host materials or by comprising the compound according to the present disclosure, it is possible to produce an organic electroluminescent device having lower driving voltage, higher luminous efficiency, and/or longer lifetime properties compared to the conventional organic electroluminescent devices.

Abstract: An electronic device and a method for providing an User Interface (UI) are disclosed. The method for providing a User Interface (UI) in an electronic device according to the present invention, the method may includes receiving a request for provision of the UI, collecting information for configuring the requested UI, classifying the collected information according to a first criterion so as to generate a plurality of pages, hierarchizing the generated pages and arranging the layers according to a second criterion so as to form a multilayer UI and providing the formed multilayer UI as the requested UI.