Well pulling out my Hero-Jr robot for some photos I noticed the two card sample booklets I go a few weeks ago. There seems to be over 300 different card stock samples in the two salesman booklets. One is called "general Purpose Card Sample IBM Data Processing Cards" form # 570-0275 9-67 and the other is "IBM Standard stock card formats" form # 570-0440 from around 1970. I had no idea of all the many card formats IBM had.