This manual describes the main programmatic interface to LispWorks, including some of the different libraries supplied for use in your source code. Note that it does not describe the Foreign Language Interface or the CAPI. Details about these libraries can be found in the LispWorks Foreign Language Interface User Guide and Reference Manual , and the LispWorks CAPI User Guide and the LispWorks CAPI Reference Manual respectively. Note further that this manual does not describe the LispWorks GUI; you should refer to the Common LispWorks User Guide for information about this.