:a = Completed or ceased<br />::Used for received single -part or completed multipart units or for continuing resources that have ceased.:b = on order<br />::Used for serial or non serial units when the units are on order but have not yet been acquired.:c = Received regularly<br />::Used for serial units when published pieces are routinely being received.:d = Not currently received<br />::Used for serial units when newly published pieces are not being received, whatever the reason, by the reporting location.