This appendix gives you information on installing AutoCAD 2005 on your system and describes the system parameters that you will want to set to configure AutoCAD to meet the needs of your operating environment. Throughout this appendix, the system variable associated with a setting, when available, is included at the end of an option description, enclosed in brackets. System variables are settings that enable you to control AutoCAD's behavior when using commands and features. You'll find a detailed description of the AutoCAD system variables in Appendix C.