I found this at http://www.eurica.ru/sound/1Cross_Diode.pdf
how do I read it? :)
Use the Chart to find a Fairchild substitute part # for your diode part # say on a schematic that your looking for.
You may see your part # in the left columns, [3 separate columns per page...looked like] then to the right are the Fairchild Sub #'s for that part.