These formats include HTML, plain text, and XML formatting. Other schemes, such as markup languages, address page and document layout and formatting. Google Talk does not provide the user with a menu for text formatting. Most modern programming languages directly include support for formatting and parsing Base16-encoded numbers. The teacher can add, text, images, tables, links and text formatting, interactive tests, slideshows etc. Several other text formatting software exist, but are not widely used. "Document" referred to WordStar word processing files containing embedded word processing and formatting commands. Regardless, these files contain large amounts of formatting code. Imagex does not have any disk formatting and partitioning capabilities. Translation of documents with maintaining structure and formatting. BibTeX is reference management software for formatting lists of references. This layer consists of subroutines for track seeking, sector reading and writing, and disk formatting. The UNFORMAT command is used to undo the effects of formatting a disk. Various screenwriting software packages are available to help screenwriters adhere to the strict formatting conventions. Please see the page for formatting standards.