The AZW file format is a proprietary ebook format developed by Amazon for use on its Kindle e-readers and Kindle apps. It is based on the Mobipocket format but includes digital rights management (DRM) restrictions to protect copyrighted content. AZW files can contain text, images, and formatting, and they are designed to be easily readable on small screens. The format supports features like bookmarks, annotations, and dictionary lookups. While AZW was the primary format for Kindle ebooks for many years, it has largely been superseded by the KF8 (AZW3) and KFX formats, which offer improved formatting and features. However, AZW files are still supported by Kindle devices and apps, and they can be converted to other ebook formats using various software tools. The DRM protection on AZW files can make it difficult to read them on non-Kindle devices without removing the DRM, which may be illegal depending on the copyright laws in your jurisdiction. The AZW format is optimized for reading on e-ink displays, providing a comfortable reading experience with adjustable font sizes and styles.