The electronic card comprises a printed circuit board assembly (1) interposed between first (7) and second (8) main card shields having edges wherein the improvement comprises tabs (9) on the edges of one shield that engage recesses (10) on the edge of the other shield and each of the tabs comprises a member having an oblique projection which engages the other shield. The first and second main card shields have rear edges and first (16) and second (56) shield extensions which project respectively from the first and second main shields.
