The file setlbin.tgz is a gzipped tar archive of the GNU SETL executables. It can be unpacked like this: cd /usr/local/bin # or perhaps $HOME/bin for testing tar xvfz setlbin.tgz # or gzip -cd < setlbin.tgz | tar xvf - The other files in this directory are small text files, the first two indicating the environment that was used to compile the executables: gcc-info.txt - output of "gcc -dumpversion; gcc -dumpmachine" uname-a.txt - output of "uname -a" tar-tv.txt - output of "tar tvfz setlbin.tgz" (file list) cksum.txt - output of "cksum setlbin.tgz" md5sum.txt - output of "md5sum setlbin.tgz" bugs.txt - Honest Dave's epistemology Each of the executables has a "--help" option. Further documentation on SETL can be found at http://setl.org/setl/ . Please contact bacon@cs.nyu.edu (David Bacon) with questions or remarks. dB