This is a collection of DDL (Device Driver Load), DDU (Device Driver Unload), LDD (List Device Drivers). As far as I know, this is the original archive from P. Frost 1991. The ddl.doc file does not contain any useful information about the software license, nor do I see anything in the .com files that tell me if this is shareware/commercial/freeware/other... For the time being, I am assuming this is free software, and can be redistributed. If this is incorrect, the author should contact me.