Program Languages

HTML - Used to make web-site. This site is also made by HTML.
XML - Stricter than HTML, but more available for various situation
Fortran - Used in science and technology calculation.
Java - Same code is available on different OS
VBA - Stand for "Visual Basic for Applications".
In this site, this language is for Excel macro, but VBA is not only for Excel macro.
If you use this language, you can do almost all Excel operation automatically.