The document defines four types of records that are important for medical device development and manufacturing: A device master record is a collection of every document needed to manufacture, package, and possibly service a medical device. Section 820.3(j) of the federal. A lot of the documents are not in the device master record, but are referenced in the dmr as to where the document is located (document control office, engineering library,. Proprietary information in this index is replaced by x's.