There are a number of Scheme and J implementations available for nearly every machine and operating system including Windows, WindowsNT, MacOS, Linux and other varieties of UNIX. Commercial versions of these languages are available as well, but free versions have proven to be more than adequate for laboratory use and students are able to install versions of the software identical to lab systems on their own machines. More information on available Scheme software may be found at:
ftp://ftp.cs.indiana.edu/pub/scheme-repository/Information on J software may be found at:
http://www.jsoftware.com .