Pointer to the object being processed. Read by SetObjectPointers, ProcessObjectDisplayLogic, ProcessDisplayRecord, CopySavedCharacterIdentifier, ApplyRoomDisplay, DescribeObjectIfPresent, SetCurrentObjectBitFive, ClearCurrentObjectBitFive, StoreCharacterAttribute, CombineCharacterRoom, PrintObjectDescriptionText, SpecialCaseObject_LooksBasilPhipps, PlaceCharacter, FindResponseForThisId, RecordResultRoomDisplay, CheckCharacterForRoomGraphics, CopyClockLink, ProcessCharacterAttribute, CopyCharacterOntoBothRecords and ActionRoomAndCharacterFlags.