FAX Retrieval of Engineering Documents (FRED)
The Power Management Products Center (PMPC) developed a collection of technical documents for metering, protective relaying and power management software that were added to the original Westinghouse FRED system.
You can see a listing of those documents at http://pps2.com/communications/files/legacyPMP/litindex.htm (http://pps2.com/communications/files/legacyPMP/litindex.htm).