A DOCX file is a document that can be created in a word processing program such as Microsoft Word, Apple Pages, or OpenOffice. It is a newer version of the Microsoft Word document format, introduced in 2007, and is part of the Office Open XML specification. The DOCX file format is a combination of XML and binary files, and it is highly editable, easy to use, and manageable in size. It is used for reports, resumes, letters, documentation, note-taking, newsletters, presentations, and more, and it can contain text, images, objects, and creative formatting. The DOCX file format is smaller than the older DOC format, making it more convenient to send via email and store on a hard drive. DOCX files can be opened using Microsoft Word or alternative third-party programs.