  We also maintain an <a href="ftp://ftp.cs.washington.edu/pub/constraints"> anonymous ftp directory</a> at UW on <code>//ftp.cs.washington.edu/pub/constraints</code>.  The  <a href="ftp://ftp.cs.washington.edu/pub/constraints/code"> code</a> subdirectory contains source code for various constraint solvers and systems, including DeltaBlue and SkyBlue.  All this code is public domain. The <a href="ftp://ftp.cs.washington.edu/pub/constraints/ppcp94"> ppcp94</a> subdirectory contains papers from the 1994 Principles and Practice of Constraint Programming Workshop.  There is a <a href="ftp://ftp.cs.washington.edu/pub/constraints/papers"> papers</a> subdirectory with research papers (but all of the papers are also listed in this WWW document, so don't bother). Finally, there is a  <a href="ftp://ftp.cs.washington.edu/pub/constraints/drafts"> drafts</a> subdirectory, which sometimes contains preliminary drafts of papers.  <p>
