The following glossary is intended to help clarify some of the terms we use in describing the literature we have available. We are available to help. Assembly Manual Assembly Manual documents every step of the process by which the vehicle was assembled in the factory with text and illustrations of every step. Besides the interesting content this is invaluable when doing a nut and bolt frame off restoration. These are only available for some 50's thru 70's GM and Ford products - no other models. Body Manual Body Manual is a separate manual that some manufacturers issue for the repair of body components. Electrical (& Vacuum) Troubleshooting Manual Electrical (& Vacuum) Troubleshooting Manual are more specialized manuals for diagnosis and system troubleshooting of electrical and vacuum problems. Factory Manual Factory Manual is the official manual issued by the vehicle manufacturer and is the most complete and authentic manual you can get. Owners Manual Owners Manual is the small book that comes in the glovebox of every car when it is new - the guide to operating the vehicle. Parts & Interchange Manuals Parts Manual is used by the parts department of the dealership and identifies every part of the car down to each nut, bolt, and washer, with it's part number. It is used mainly for the many detailed illustrations it contains. Parts Interchange Manual identifies what parts on a car or truck might be the same as those on other cars and truck and can be interchanged. This is invaluable when searching wrecking yards. Shop, Service or Repair Manual Shop Manual (also called "Service Manual" or "Repair Manual"). A shop/service/repair manual is a guide to diagnose, repair and rebuild a particular car or truck.