In 2008, Microsoft replaced DOC with DOCX (Office Open XML or OOXML) as the default Word file format. Although DOC is native to Microsoft Word, other common word processors such as Apple Pages and AbiWord can create, read, and edit DOC files. DOC and DOCXĭOC – short for document – is a Microsoft proprietary filename extension for storing documents in Microsoft Word Binary File Format. Currently, there are eight types you’re likely to encounter in the course of office document management. 8 Document File Types and ExtensionsĪlthough developers have used more than two dozen document filename extensions in the past, more than half of these have fallen out of use. With regard to documents, filename extensions typically tell users what kind of programs will be compatible with the file, whether it is a markup language for use in a web browser and whether it may have read-only functionality. As programs became more complex and operating systems multiplied, developers shifted towards using filename extensions to indicate associated programs or functions. Over time, developers began writing programs with multimedia functionality capable of handling a variety of data types. Filename extensions are a class of metadata, and they contain information about how data is stored in a file and how it is used.ĭevelopers originally used filename extensions to indicate catalog or index information to other users such as TXT for plain text, MUS for music, and GFX for graphics. What are Document File Types and Extensions?ĭocument file types or extensions – also called filename extensions – refer to the 2-4 letter suffixes appended to a filename after a period. Some document file types are proprietary releases by developers such as Microsoft, some are open-source, and others are written in markup languages for rendering information in web browsers.Developers have used dozens of document file types in the history of electronic document storage but you’re likely to encounter fewer than ten of these in current use.Document file types and extensions are suffixes on filenames that tell users what kind of information to expect in a file and what kind of applications they can use to open a file.
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