Definition

Noun: A card index is a physical collection of individual cards, each containing specific information about a single item (such as a book, person, or topic), organized in a systematic order, typically alphabetically. It is a manual filing system used for easy reference and retrieval of information.

Usage

A card index is used to catalog and locate items within a collection, such as in a library, archive, or office. Each card represents one entry and is filed in a drawer or box.

Examples

• The librarian consulted the card index to find if the library had a specific journal.
• Before digital databases, researchers relied on a card index to find sources in the archives.
• She maintained a detailed card index of all her business contacts.

Advanced Usage

• "To cross-reference in a card index": To include a note on a card directing the user to look at another related card in the index.
  • The subject entries in the old card index were extensively cross-referenced.

Variants and Related Words

• Card catalog (noun): A synonym, especially common in the context of library book listings.
  • The library replaced its card catalog with an online search system.
• Index card (noun): Refers to the individual blank card used within a card index system.
  • He wrote each recipe on a separate index card.

Synonyms

• File: A collection of papers or records arranged in a particular order.
• Catalog: A complete list of items, typically in systematic order.

Related Phrases

• "To look something up in the card index": To search for information within the card index system.
  • You'll need to look the author's name up in the card index.

Noun

1. an alphabetical listing of items (e.g., books in a library) with a separate card for each item