Files with the extension "docx" are a new format for the Microsoft Word documents that has been designed to improve the file size reduction. The latest Microsoft Word was released as a part Microsoft Office 2007 and is popular word-processing software for creating, editing and printing documents. Microsoft Word versions prior to Office 2007 cannot open "docx" format files.

References

• "GO! with Microsoft Office 2007: Introductory," Shelley Gaskin, Robert L. Ferrett, Alicia Vargas, and Carolyn E McLellan, Jan 7, 2009.
• "File Extension .DOCX Details"

About the Author

Oxana Fox is a freelance writer specializing in medicine and treatment, computer software and hardware, digital photography and financial services. She graduated from Moscow Medical College in 1988 with formal training in pediatrics.