RB is a file format used for storing software-related data in the RealBASIC development environment. It stores compiled applications and libraries, enabling developers to package their code into a usable file. RB files are often used for cross-platform development, particularly for macOS, Windows, and Linux systems.
EPUB is an open-source ebook format designed for digital books. It allows text and images to adapt to different screen sizes, making it ideal for reading on various devices, such as smartphones, tablets, and e-readers. EPUB supports rich formatting, multimedia elements, and interactivity, offering a flexible and portable ebook format that is widely supported by ebook readers and apps.