Rolodex

A Rolodex is a rotating file device used to store business contact information (the name is a portmanteau word of rol```ling`` and ``in```dex) currently manufactured by Newell Rubbermaid. The Rolodex holds specially shaped index cards; the user writes the contact information for one person or company on each card. The cards are notched t...
Found on http://en.wikipedia.org/wiki/Rolodex

Rolodex

noun (trademark) a desktop rotary card index with removable cards; usually used for names, addresses, and telephone numbers; `a news reporter has to have a good Rolodex`
Found on https://www.encyclo.co.uk/local/20974
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