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Compressed volume file = a compressed archive that retains/maintains the content of a disk drive/volume or partition of a disk drive/volume (Microsoft DoubleSpace/DriveSpace).
Cover page file (GFI Software Development's GFI FaxMaker).
Fax cover page (Hayes JT Fax).
Fax coversheet (SuperFax).
SmartFax cover page file (SmartFax).
SmartFax image file (Pierre-e Gougelet's XnView).