(out of order)
NDEV - The main development kit console for the Wii.
RVT - The product code for Wii development and testkit items. See RVL, Product Code
RVL - The Wii product code for retail items (See RVL Product Codes)
Product Code - The three-letter code that distinguishes a Nintendo product line.
Host I/O - The connection between a development system such as the NDEV and its host PC