Bridge Challenger playing cards accompanied the hand-held electronic game Bridge Challenger Model BRC manufactured by Fidelity Electronics in the USA during the 1970s & 80s. It was a high quality game packaged in an attaché case for the serious player and these playing cards were included in the case.
The bar codes on the faces of the cards are so the machine can read the cards. The game also has a voice synthesizer and can speak the card names. Clever stuff.