AutoLISP is the programming language behind AutoCAD. It allows the user to access the workings of AutoCAD to customise commands, thus increasing efficiency and productivity. This book covers AutoLISP comprehensively, but without overloading the reader. It is an ideal introduction to a complex subject, and will be particularly suitable for City and Guilds 4351-05 students of AutoLISP Programming, as well as CAD technicians in industry who will be able to refine AutoCAD for the particular needs of their company.