I picked up this vintage card index meant for filing business cards on July 20th for a fantastic $1.50.  I hadn’t seen a card index this small before and suspected that it was designed as a sort of Rolodex for storing 2 x 3.5″ standard business cards. It makes an excellent storage for those as well as for the several dozen other old affinity cards and library cards I’ve got. Of course, my problem is that it only fits about half of the business cards I’ve got. 

There are a few places that still make card dividers for this size format, but I opted to make my own from 11 x 17″ card stock.

I'm a biomedical and electrical engineer with interests in information theory, complexity, evolution, genetics, signal processing, IndieWeb, theoretical mathematics, and big history. I'm also a talent manager-producer-publisher in the entertainment industry with expertise in representation, distribution, finance, production, content delivery, and new media. View all posts by Chris Aldrich