At a minimum, you need Access 2007 in order to implement the examples provided throughout the book. One topic covered in Chapter 8 is how to retrieve data from web services, which requires the Office Web Services toolkit. The Office Web Services toolkit is available for downloading from Microsoft’s web site. Chapters 10 and 14 deal with examples based on SQL Server 2005 as the database, and thus a copy of SQL Server 2005 is needed to implement those examples. A free entry-level version of SQL Server 2005 is available for downloading from Microsoft’s web site.