The following manuals are zip files of scans of the manuals converted to PDF format. They were scanned at 300 dpi and converted straight to PDF. No OCR was done as it seemed to really mess things up.
Network Controller 3 Operation Guide (400K)
Network 3 Operation System (1.3M)
Network 3 Addendum Version 2.0 (314K)
Network 3 Addendum Version 2.14 (700K)