Acroread or ghostscript is required to view or print a file.pdf in PDF format. Note that .ps.gz files typically are about half the size of .pdf.gz files, so this archive has mostly .ps.gz files. The tar utility expands file.tar into a directory of files. The shar utility expands file.shar into a directory of files. The zip utility expands file.zip into a file or a directory of files, depending on how file.zip was prepared.
Zip files are about the same size as gzip files.
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