An e-book file format used for digital publications. It is widely supported by e-readers and mobile devices.

A widely used document format that preserves layout and formatting across devices. It is commonly used for sharing official documents.

The eBook format used by Apple's iBookstore, designed for use on iPhones, iPads, and other Apple devices.

A digital book format optimized for Amazon Kindle devices, allowing users to store and read eBooks on Kindle devices and apps.