-Extract each FILE according to its extension.
-7z bz2 deb gz iso rar rpm tar xz zip & variations.
-See source for exact file extensions."
+Extract many types of files
+
+Based on their extensions,
+7z [tar.]bz2 deb [tar.]gz iso dsc rar rpm sfs tar xpi [tar.]xz zip Z.
+See source for exact file extensions.
+Note: dtrx (package & command) extracts most of these plus some others."
+