The Microsoft Office Professional 2007 Retail Version is a complete software suite that includes a CD with installation key for easy setup. This version is designed for use with Microsoft Windows 7, Windows XP, and Windows Server 2003 operating systems, requiring a minimum of 2 GB of hard drive space and 256 MB of RAM. With its full range of office tools and features, this product is ideal for businesses and individuals looking for a reliable and comprehensive solution for their productivity needs in English language.