1. A system, comprising:a card comprising:
a connector on a first edge of the card configured to couple with a corresponding connector of a circuit board such that the card and the circuit board are oriented parallel to one another;
a connector on a second edge of the card configured to couple with a corresponding connector of an adjacent card mounted in a same plane as the card; and
a mounting slot configured to restrict movement of the card in a first direction and allow at least some movement of the card in a second direction, wherein the mounting slot is configured to limit the movement of the card in the second direction to a distance that is less than a width of the connector on the second edge of the card.