LispWorks is a commercial implementation and IDE for the Common Lisp programming language. The Personal Edition is intended for personal and educational Lisp programming. As a contribution to the Common Lisp community, we make LispWorks Personal Edition available free of charge. While the Personal Edition includes the full Common Lisp compiler and the LispWorks integrated development environment, it does limit program size and duration and it does not support delivery of runtimes. The Professional Edition includes everything you need for commercial Common Lisp software development and application delivery. CLIM 2.0 is included to allow support of legacy applications on Windows and Motif. LispWorks Enterprise Edition includes all the features of the Professional Edition, and provides further support for software needs of the modern enterprise, including: Database access via ODBC or native Oracle, PostgreSQL and MySQL interfaces through Common SQL. Industry standard distributed computing through LispWorks ORB. Expert system programming through KnowledgeWorks® which has an embedded Prolog compiler. Applications developed with the Enterprise Edition in version 4.2 and later can be distributed free of charge.