There are several ways to achieve serendipity when looking at the catalog: using call numbers and using subject headings.
Call numbers are standardized. Yale Library uses the Library of Congress for the majority of our books, and in online systems, the print books we hold will have call numbers that virtually place them next to one another when you perform a call number search. Most ebooks do not have call numbers in their record right now, though, because we receive ebook records from the vendors without a call number.
Subject headings leverage the classification tools that librarians have created to make finding materials easier. Both online and print books have subject headings, and the subject headings in a catalog record are clickable.
A "subject heading hierarchy" means that Biology > Data Processing, if you click on "Data Processing" in the record, will take you to only data processing in biology, not data processing in general. This is due to the hierarchy.
The image below shows you the drop-down menu beside the search box when you are in Books+, our catalog. Searching for a subject here will match the word anywhere it appears in our subject terms. We have a suite of options for catalog searches.
The image below shows how to do a call number search. This is something that you might decide to do if you are looking for what else might be classified alongside a book you really like, although it won't catch most ebooks.
The book record below shows an example of where to find a call number and the clickable subject terms. Depending on where the book is located, there may be different options for acquiring it, such as receiving a scan of the book or having it delivered to a location near you.
If you want to get started with subject browsing and digital serendipity in the catalog, here are some selected books where you might start. They have been selected for their breadth of topics. Some of these books are available in both print and e formats; in those cases, the e-version has been included for accessibility.