Parallel generation of the postfix form

A printed wiring board (20) and connector (12) apparatus in which a coordinate array of terminal contact areas (22) on the board (20) make only simultaneous and exclusive electrical contact with a corresponding array of connector contact springs (24). Premature and unwanted electrical contacts are prevented as the board (20) is moved into association with the connector (12) by cams (23) protruding from the board (20) which maintain a separation between the board contact areas (22) and the connector springs (24) until full movement of the board is completed. At this point, the cams (23) are seated in corresponding recesses (26) provided therefor in the connector (12) surface to permit the mating of contact areas and springs.