Standard deck of playing cards but the back of each card is the title "Cray Research Park" and an aerial picture of the company located in Eagan, Minnesota.

The cards are still in their shrink-wrap and came boxed in a gold and blue (maybe purple...hey, I'm color blind and there's no one here to ask on this November Saturday afternoon) box.

According to Chips Etc.¹, the cards are likely from the late 1980's. The Research Park, a "480,000-square-foot campus & headquarters of Cray Research" was sold in 2002.