Placed sh, bash, csh, tcsh in <command>
Placed commands in <command>
Placed options in <option>
Placed several commands in man entities
Placed several applications in <application>
Placed make vars/targets into <makevar>/<maketarget>
Placed filenames in <filename>
<literal>chmod()</literal> -> <function>chmod()</function>

ATT -> AT&T
endeavour -> endeavor
tcl -> Tcl