What do al lthe prefixes and suffixes stand for on Von Duprin exit devices

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Schlage and Falcon use the P cylinder suffix to designate conventional key-in-lever (KIL) 6 pin cylinder.  The D means that the lock will have a deadlatch.
To order Von Duprin exit device reference the "Additional information/How to order" section in the Von Duprin catalogs. All Von Duprin device series Catalogs are available on website.