SoIndexedMarkerSet(3) on Linux
The text 47f851d0851c, as Debian 7 (Wheezy) shipped it.
The SoIndexedMarkerSet class is used to display a set of bitmap markers at 3D positions. This node either uses the coordinates currently on the state (typically set up by a leading SoCoordinate3 node in the scenegraph) or from a SoVertexProperty node attached to this node to render a set of 3D points.