What You Need

  In order to use psd you need GNU Emacs (either version 18 or 19 will do, I have tried psd with with 18.58 and 19.19), the cmuscheme package for Emacs, a preferably R4RS [1] compliant Scheme interpreter and the psd package. GNU Emacs can be found at many major ftp sites, for example nic.funet.fi. These ftp sites also carry Scheme interpreters. A good place to look for Scheme related material is the Scheme Repository at nexus.yorku.ca maintained by Ozan Yigit, or its mirror sites, at least ftp.inria.fr and faui80.informatik.uni-erlangen.de. Psd is available at the repository as well as at cs.tut.fi using anonymous ftp ( /pub/src/languages/schemes).