Abstract: A method includes storing a plurality of content items and storing one or more associations. Each of the associations includes an association between exactly two of the content items. The method may also include causing a graphical user interface (GUI) to be presented on an electronic device. The GUI may include a first representation of a first content item, a list of representations comprising a second representation of a second content item and a third representation of a third content item, a first visual indicator indicating a first association between the first content item and the second content item, and a second visual indicator indicating a second association between the first content item and the third content item. The method may also include receiving a user input comprising an instruction to create an additional association between the first content item and the second content item.

Abstract: A method includes storing a plurality of content items and storing one or more associations. Each of the one or more associations includes an association between exactly two of the plurality of content items. The method may also include causing a graphical user interface to be presented on a display of an electronic device. The graphical user interface may include a first representation of a first content item of the plurality of content items, a list of representations comprising a second representation of a second content item of the plurality of content items and a third representation of a third content item of the plurality of content items, a first visual indicator indicating that a first association of the one or more associations exists between the first content item and the second content item, and a second visual indicator indicating that a second association of the one or more associations exists between the first content item and the third content item.

Abstract: Disclosed are various exemplary embodiments of an air cleaner assembly for a machine. The air cleaner assembly may include a filter housing and a filter element. The filter housing may include a mating surface extending in a first plane and defining a filter opening thereon. The filter housing also includes a filter engaging member associated with the mating surface. The filter element may include a filter frame extending generally in a second plane and defining an opening for receiving a filter medium. The filter element may also include a sealing member disposed in the filter frame around the opening and configured to seal around the opening when the filter frame is brought into contact with the mating surface. The filter element may further include a blade extending from the filter frame and configured to engage with the filter engaging member.