Hurd, Cuthbert C., ed. Proceedings: IBM Computation Seminar December 1949. New York: Internation Buisiness Machines Corporation, 1951. http://archive.org/details/bitsavers_ibmproceedeminarDec49_14295048.

In a variety of context here the idea of "cards" could be held to be synonymous with "notes".

Collision cards (though used in a physics setting) could be a bit hilarious with the idea of "atomic notes" and the idea of "combinatorial creativity".