European Packaging Specifications (IEC 60297, IEEE 1101.1, IEEE 1101.10, IEEE 1101.11). Refer to BackPlane Buses

Eurocard is a European standard format for PCBs, which can be plugged together into a standardized subrack. The subrack consists of a series of slotted card guides on the top and bottom, into which the cards are slid so they stand on end, like books on a shelf. At the "back" of each card is one or more connectors, which plug into mating connectors on a backplane which closes the rear of the subrack.

A commonly used form factor in the embedded computer industry.