PCI-104 Card
PC/104 is a embedded computer standard, intended for specialized embedded computing environments where applications depend on reliable data acquisition despite an often extreme enviroment. The PC/104 form factor has no backplane and allows modules to stack together like building blocks, which is more rugged than typical bus connections in PCs.
The PCI-104 form factor includes the PCI connector, but no the ISA connector, in order to increase the available board real estate. This standard is incompatible with PC/104 boards.
Examples of PCI-104 Cards
AceXtreme MIL-STD-1553 PCI-104 Card (BU-67104C)
AceXtreme MIL-STD-1553 & ARINC 429 PCI-104 Cards (BU-67108C)