Computable Document Format (CDF)

• a new electronic document format that has been designed to allow easy authoring of dynamically generated interactive content. 
• It was created by Wolfram Research. Computable document format supports GUI elements such as sliders, menus and buttons. 
• Contents can include formatted text, tables, images, sounds and animations. It allows document content to be generated in response to user interaction using any algorithms or visualizations.
• This makes it particularly suited to scientific, engineering and other technical content and digital textbooks.
• CDF files can be read using a proprietary CDF Player with a restrictive license, which can be downloaded free of charge from Wolfram Research.