The difference between a tablet and an e-reader lies primarily in their functionality and design. Tablets are multifunctional devices that combine features of smartphones and computers, supporting a variety of applications, including web browsing, gaming, and productivity tools. On the other hand, e-readers are specialized devices designed primarily for reading digital books and documents, utilizing e-ink technology to mimic the appearance of printed paper and reduce eye strain. While both devices can be portable, e-readers typically offer longer battery life and better readability in bright sunlight, focusing solely on the reading experience.