This logo represents a series of panels in a 3d space, the center panel is opened. The panels also form an 'o' shape, further connecting it to the name Open Panels.
This logo shows two series of semi-transparent panels that over lap one another, the center panel is open, connecting it to the name Open Panels. The top panel forms an 'O' shape and the bottom forms a "P," representing the initials for Open Panels.