The file setl-1.0-bin.tar.gz is a gzipped tar file which can be unpacked like this: cd /usr/local/bin # or perhaps $HOME/bin for checkout gzip -cd < setl-1.0-bin.tar.gz | tar xvf - The other files in this directory are short ASCII files indicating the environment that was used to compile the SETL system: gcc-info - the output of "gcc -dumpversion; gcc -dumpmachine" uname-a - the output of "uname -a" tar-tv - a listing of the files in setl-1.0-bin.tar.gz Please contact bacon@cs.nyu.edu (David Bacon) with questions or remarks. dB