Thesis to bear out (only tangentially related to this particular text):

Part of the reason that index card files didn't catch on, especially in America, was that they didn't have a solid/concrete name by which they went. The generic term card index subsumed so much in relation to library card catalogues or rolodexes which had very specific functions and individualized names. Other cultures had more descriptive names like zettelkasten or fichier boîte which, while potentially bland within their languages, had more specific names for what they were.