Introduction
A library catalogue is a tool used to list and describe all the materials held by a library. It helps users find books and other resources by providing bibliographic details like title, author, subject, and classification number. The inner form of a library catalogue refers to the physical or digital structure used to present the catalogue entries.
Definition of Inner Forms of a Catalogue
The inner form of a catalogue is the format in which the catalogue information is arranged and displayed for users. It determines how entries are stored, accessed, and searched. The inner form influences the usability, efficiency, and convenience of the catalogue.
Types of Inner Forms of a Library Catalogue
There are mainly three types of inner forms used in libraries:
1. Card Catalogue
This is the traditional and widely used physical form of a catalogue before the digital era. Each item in the library has a card with its bibliographic details.
- Cards are arranged in drawers, usually in alphabetical order.
- Three types of cards: author card, title card, subject card.
- Easy to update manually by adding or removing cards.
2. Book Catalogue
This format presents the catalogue entries in a book format, usually arranged alphabetically or by classification number.
- Entries are printed and bound together.
- Can be divided into different sections: author, title, subject.
- Not easy to update—requires printing new editions.
3. Sheaf Catalogue
This is a loose-leaf format in which each entry is typed or printed on a separate slip or sheet and filed in a binder.
- Easier to update than book catalogues.
- Less bulky and more flexible.
- Used mostly in smaller libraries or special collections.
4. Online or Digital Catalogue (OPAC)
With the advancement of technology, most libraries now use OPAC (Online Public Access Catalogue) as the inner form.
- Accessible via computer or mobile device.
- Allows keyword and advanced search options.
- Easy to update, manage, and integrate with library systems.
Conclusion
The inner form of a library catalogue plays a crucial role in determining how users interact with the catalogue. While traditional forms like card and book catalogues are still found in some places, most modern libraries use OPACs for convenience and efficiency. Understanding the different inner forms helps in choosing the most suitable format for managing library information.