Define: Left- VS. Right-handed Coordinate System. Rotation

Left-handed coordinate system The default coordinate system in the RenderMan(TM) Interface is left-handed: the positive x, y and z axes point right, up and forward, respectively. Positive rotation is clockwise about the axis of rotation.		Right-handed coordinate system The default coordinate system in OpenGL(TM) is right-handed: the positive x and y axes point right and up, and the negative z axis points forward. Positive rotation is counterclockwise about the axis of rotation.
positive x rotation positive y rotation positive z rotation		positive x rotation positive y rotation positive z rotation