The first popular mezzanine card that was adapted to VMEbus, CompactPCI and PCI cards. IndustryPack (IP) cards are 3.9 x 1.8" and provide a 16-bit data path (double-wide 32-bit cards are specified, but not widely used). IP cards use two 50-pin connectors, one at each end of the card. See
mezzanine card.
IP Card and PCI Adapter
This illustration was drawn from products from Dynamic Engineering. The IP card is a serial I/O card used for data acquisition, and the PCI card is an IP to PCI adapter. The PCI card holds three IP cards, although only one set of sockets is shown. (Drawn from donated products courtesy of Dynamic Engineering.)