open finder, then click up in the search folder, then type system preferences, when you find it click it and once its open right click (however u do that depending on which mac system) the icon in the dock and click keep in dock and voila.
or you have deleted it forever in this case erm.....pass
open finder, then click up in the search folder, then type system preferences, when you find it click it and once its open right click (however u do that depending on which mac system) the icon in the dock and click keep in dock and voila.
or you have deleted it forever in this case erm.....pass