Card index is a term used to describe a system of organizing information using physical cards. When pronounced, "card index" is spelled in IPA phonetic transcription as /kɑːrd ˈɪndeks/. The first syllable is pronounced as "kard" with an "a" sound that is similar to the word car. The second syllable is pronounced as "in-deks" with a short "i" sound for "in" and "eks" ending with an "x" sound. This system was popular in libraries and businesses before the advent of digital information storage.
A card index, also known as an index card or filing card, is a compact, individual piece of cardstock, typically measuring about 3 inches by 5 inches, used to store and organize information in a systematic manner. The card is sturdy and durable, making it suitable for long-term use.
A card index serves as a practical and efficient database where various types of information, such as names, addresses, dates, and other pertinent details, are meticulously recorded. To maintain a consistent format, each data entry is typically written on a separate card, allowing for easy sorting, searching, and retrieval.
The cards in a card index are often organized systematically, where they are categorized alphabetically, numerically, or according to a predefined classification system. Moreover, visually appealing dividers or guided tabs may also be utilized to further segregate the information for swift access.
With the ability to archive a large quantity of information in a compact and tangible way, card indexes have historically been widely used in libraries, archives, research institutions, and offices. In recent times, digital technologies have largely replaced physical card indexes by offering more efficient and space-saving solutions. However, their original concept and organizational methodology still serve as the foundation for contemporary digital databases and information management systems.
The word "card index" derives from two separate components: "card" and "index".
The term "card" originates from the Latin word "charta", meaning "paper". In the late 14th century, it became "carde" in Middle English, referring to a playing card or similar piece of stiff paper. Over time, "card" evolved to encompass various forms of paper or cardboard used for different purposes, including writing, identification, and organization.
The word "index" traces back to the Latin word "indicare", which means "to point out" or "to indicate". It entered English in the late 16th century, referring to a list of items or topics along with corresponding references. An index functions as a guide or reference tool, helping to locate specific information within a larger body of text or collection.