Description: The type of technology (discriminated primarily according to feeder mechanism type) employed by the input sub-unit. Note, the Optional Input Class provides for a descriptor field to further qualify the other choice. Additional information: Tray 1 is the right side tray and is always present. Tray 1 can operate in manual feed mode but is typically treated as a normal input source. Therefore, its type is ePsheetFeedAutoNonRemovableTray. Trays 2 and 3 are the drawers and, although they are usually not removed from the printer, the printer cannot distinguish the open and removed conditions. Therefore, when they are open, they are considered to be removed and, for this object, they are considered to be of type ePsheetFeedAutoRemovableTray. Tray 4 is the envelope feeder, which is removable at any time. Tray 5 is the high capacity input device. .