Abstract: An electronic shelf having a back plane and side walls which are themselves printed circuit boards in communication with the back plane. Each side walls has connectors which may be opened for the sliding reception of an edge card into the shelf, the connectors then being closed to make electrical contact with the edge cards through terminals in the connector. Each connector has flexible conductors to permit opening and closing of the connector and conveniently the flexible conductors are provided by a flexible cable. Use of flexible cable permits minimizing distances between conductors and terminals. Also covered is an electrical connecor with specific features suitable for its use upon a side wall of the shelf.