the card is wrongly inserted. [0026]FIG. 7B is a cross section showing the same state as FIG. 7A. [0027]FIGS. 8A, 8B and 8C are a plan view, a front view and a cross-sectional view of a double-height thick card, respectively. [0028]FIG. 9 is a bottom view of the double-height thick card. [0029]FIG. 10A is a partly cutaway plan view showing a connector of a previous invention. [0030]FIG. 10B is a