Universal encyclopedias are comprehensive reference works that provide information on a wide range of subjects. They aim to cover various fields, including science, history, geography, and culture, making them valuable resources for students, researchers, and general readers. These encyclopedias are typically organized alphabetically and include articles, illustrations, and maps to enhance understanding. Many universal encyclopedias are available in both print and digital formats, allowing for easy access to information. Notable examples include the Encyclopædia Britannica and World Book Encyclopedia. They serve as foundational tools for learning and knowledge acquisition, promoting a better understanding of the world.