"Hello World", the magic words that makes you smart

It's my 1st blog posting,

I'm sure all must have "Hello World".
If you feel too hard to understand/learn something,
just spell "Hello World" in your mind,
and so...... you can see how easy it is.

After that ?... Up to you :)
I think you don't want just say hello... :)
Let's go on...

In Programming, you can find many Hello World here :
http://www.roesler-ac.de/wolfram/hello.htm