wildcards
What about them? In computer technology, science fiction, card games?
http://www.bing.com/search?q=wildcards&form=EDGNTC&qs=PF&cvid=c2984ef1bf7f463a96eadbb236d28dd0&pq=wildcards
http://www.bing.com/search?q=wildcards&form=EDGNTC&qs=PF&cvid=c2984ef1bf7f463a96eadbb236d28dd0&pq=wildcards