Classified Catalogue Explained

A library catalogue is an organized list of all the items, such as books, journals, and multimedia, available in a library. Its primary purpose is to help users find specific items or discover resources on a particular subject. Different types of catalogues use various methods for organizing and presenting information.

The question specifically asks about a catalogue in which some entries are in the form of number entries and some in the form of text entries. Let's analyze why the classified catalogue fits this description.

Understanding Catalogue Entry Types

• Number Entries: These entries typically refer to classification numbers or call numbers that represent the subject of the item. For example, a book on computer programming might have a Dewey Decimal Classification (DDC) number like 005.133. These numbers are crucial for grouping similar subjects together systematically.
• Text Entries: These entries include information presented in textual format, such as author names, titles of books, subject headings (words or phrases describing content), publication details, and descriptive notes.

Features of a Classified Catalogue

A classified catalogue is primarily arranged by subject, following a specific classification scheme (such as Dewey Decimal Classification or Library of Congress Classification). This arrangement leads to its unique structure:

• The main part of the classified catalogue consists of entries arranged by their classification numbers. These are the number entries. Each entry under a classification number provides full bibliographic details of the item, allowing users to browse all materials on a specific subject by their classification number.
• To provide access to these numerical entries, a classified catalogue also includes an alphabetical index. This index contains text entries, which are typically subject headings, author names, and titles. These text entries refer back to the relevant classification numbers in the main part. For instance, if a user searches for "Physics" (a text entry), the index will direct them to its corresponding classification number (e.g., 530), under which all physics books are listed in the classified sequence.

Therefore, a classified catalogue uniquely combines both a systematic numerical arrangement for subject access (via number entries) and alphabetical text-based access points (via text entries in its index) to guide users comprehensively to library materials. This dual approach makes it a powerful tool for subject browsing and detailed information retrieval.

Comparing with Other Catalogue Types

To further clarify, let's briefly compare the classified catalogue with the other options:

• Author Catalogue: This type of catalogue is arranged alphabetically by the author's name. It primarily uses text entries (author names) for its organization.
• Dictionary Catalogue: This is a single, integrated alphabetical sequence of authors, titles, subjects, and series. While it contains diverse information, its primary arrangement is alphabetical by text, not a structured combination of number entries and text entries in the way a classified catalogue does.
• Title Catalogue: This type of catalogue is arranged alphabetically by the title of the items. It primarily uses text entries (titles) for its organization.

Based on these characteristics, the classified catalogue is the specific type of catalogue that effectively utilizes both number entries (for its main classified sequence) and text entries (for its alphabetical index) to provide comprehensive access to library materials.