Convert EPUB to 3 (Man Page)

The EPUB (Electronic Publication) file extension is a widely utilized format for digital books and publications, leveraging its versatility across various e-readers and devices. Officially established by the International Digital Publishing Forum (IDPF) in 2007, it superseded the Open eBook standard. EPUB's structure allows for reflowable content, meaning text can adapt to different screen sizes, enhancing readability. It supports multimedia elements, such as images, videos, and interactive features, making it suitable for diverse digital publications beyond conventional eBooks. EPUB's adoption stems from its open standard, promoting broad compatibility and ease of access in the digital publishing landscape.

The 3 file extension refers to Unix Section 3 manual pages, which document library functions in Unix-based systems. These manual pages, or man pages, provide detailed information about C library functions, excluding system call wrappers. Introduced as part of the Unix documentation system, they help users understand how to use various library functions effectively. You can view these files using the "man" utility or any text editor.