if(!isstring(PathThead),
PathThead="";
);
if(iswindows(),
 PathS="C:\Program Files\scilab-6.0.0\bin\scilex";
 PathC="C:\MinGW\bin\gcc.exe";
 Pathpdf="C:\Program Files\SumatraPDF\SumatraPDF.exe";
 PathR="C:\Program Files\R\R-3.4.2\bin";
 PathA="C:\Program Files\asir\bin\asir";
 PathM="C:\maxima-5.37.3\bin\maxima.bat";
 PathV3="C:\Program Files\VCG\MeshLab\meshlab";
 PathF="C:\cygwin\bin";
 PathAd="C:\Program Files\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe";
);
if(ismacosx(),
 PathS="/Applications/scilab-6.0.0.app/Contents/MacOS/bin/scilab";
 Pathpdf="preview";
 PathC="gcc";
 PathR="/Library/Frameworks/R.framework/Versions/Current/Resources/bin/R";
 PathA="/Applications/cfep.app/OpenXM/rc/asir";
 PathM="/Applications/Maxima.app/Contents/Resources/maxima.sh";
 PathV3="/Applications/meshlab.app/Contents/MacOS/MeshLab";
 PathF="/Applications/FriCAS.app/Contents/Resources/bin/fricas";
 PathAd="/Applications/Adobe Acrobat Reader DC.app/Contents/MacOS/AdobeReader";
 Mackc="sh";
);
if(islinux(),
 PathS="scilab";
 Pathpdf="evince";
 PathC="gcc";
 PathR="R";
 PathA="asir";
 PathM="maxima";
 PathV3="Meshlab";
 PathF="fricas";
 PathAd="acroread";
);

if(Langhelp=="e",
 Helplist(["+","+3d","+mv"],"helpE");
,
 Helplist(["+","+3d","+mv"],"helpJ");
);

setdirectory(Dircdy);