One of the most popular document formats is binary-based DOC (Document) format. Even though it is outdated, people still use it in versions 1997-2003 of Microsoft Word. In newer versions of Microsoft Word, DOCX is the new default format instead of the DOC. Although DOC format is proprietary, it can still be opened and saved with slight disturbance of formatting in most word processing programs such as Apple Pages, OpenOffice Writer, etc. Since DOC format was irreplaceable for a long time, it’s no wonder it supported text formatting, text alignment, styles, graphics, pie charts, images, tables, printing options, etc. DOC format had applications in offices, schools, etc. as a useful file to open, save, and edit if needed.