This is an upgrade version of Microsoft Office Standard 2007 with a product key included. It is compatible with Windows operating systems, including Microsoft Windows XP, Microsoft Windows Vista, and Windows. The software suite requires a minimum of 256 MB of RAM and 1.5 GB of hard drive space, and a processor speed of 500 MHz or higher. It is in English language and comes in CD format. The license category is Standard. This item is for users who want to upgrade their Microsoft Office software suite.