This document describes PSL (Portable Standard Lisp 1), a portable, ”small” and fast LISP developed originally at the University of Utah and the Hewlett-Packard Company. The present version of PSL is supported by the Konrad–Zuse-Zentrum Berlin. PSL is upward-compatible with Standard Lisp 2. In most cases, Standard Lisp did not commit itself to specific implementation details (since it was to be compatible with a portion of ”most” LISPs). PSL is more specific and provides many more functions than described in that report.
The goals of PSL include: