These files are present for informational purposes. They are not used or installed by the programs. All of them are available elsewhere, and the versions in this distribution may be out of date. COPYING and COPYING.LIB contain the GNU Public Licenses, which apply to the binaries created by this distribution, and some of the source files. (Each source file states its copying conditions.) MIRROR is a list of mirror sites for TeX and GNU software. (For the latest, finger ctan@ftp.tug.org and fsf@prep.ai.mit.edu, respectively.) texinfo.tex is the macro file needed to produce DVI files to print the documentation. (For the latest, check the latest GNU distribution, or /gd/gnu/texinfo/texinfo.tex if you have an account on the FSF machines.) unixtex.ftp describes how to obtain a TeX system by ftp or on physical media, and some alternative TeX distributions. (See http://www.tug.org/unixtex.ftp.)