This manual, the SPSS Statistics Base 17.0 User's Guide, documents the graphical user interface of SPSS Statistics. Examples using the statistical procedures found in SPSS Statistics Base 17.0 are provided in the Help system, installed with the software. In addition, beneath the menus and dialog boxes, SPSS Statistics uses a command language. Some extended features of the system can be accessed only via command syntax. (Those features are not available in the Student Version.) Detailed command syntax reference information is available in two forms: integrated into the overall Help system and as a separate document in PDF form in the Command Syntax Reference, also available from the Help menu.