1 REM HELLO WORLD COMMODORE 64 BASIC
2 ? "HELLO WORLD"
3 END

# Ruby
#!/usr/local/bin/ruby -w
puts "Hello world"

// C
#include <stdio.h>
int main(void)
{
    printf("Hello World\n");
    return 0;
}

// C++
#include <iostream.h>
int main(void)
{
    cout << "Hello World" << endl;
    return 0;
}

// JAVA



class helloWorld
{
    public static void main(String args[])
    {
        System.out.println("Hello World");
    }
}

// Texas Instruments TI-81 BASIC
Prgm1:HELLO...
:Disp "HELLO WORLD"

// x86 inlined assembler.
#include <stdio.h>

char format[] = "%s %s\n";
char hello[] = "Hello";
char world[] = "world";
void main( void )
{
   __asm
   {
      mov  eax, offset world
      push eax
      mov  eax, offset hello
      push eax
      mov  eax, offset format
      push eax
      call printf
      pop  ebx
      pop  ebx
      pop  ebx
   }
}

Perl  
#!/usr/bin perl -w  
print ("hello world");  
  

        

Bash  
#!/bin/bash  
echo "Hello world"  

// Hello World .NET

#using <mscorlib.dll>
using namespace System;

int _tmain()
{
    Console::WriteLine(S"Hello World");
    return 0;
}

// Hello World in brainfuck 
// http://dtors.ath.cx/brainfuck.txt
// Creds to Speedy
>+++++++++[<++++++++>-]<.>+++++++[<++++>-]<+.+++++++..+++.[-]
>++++++++[<++++>-] <.>+++++++++++[<++++++++>-]<-.--------.+++
.------.--------.[-]>++++++++[<++++>- ]<+.[-]++++++++++.

%% Erlang

-module(hello).
-export([world/0]).


world() -> io:format("Hello world").

<?php
// PHP 
<?= "Hello world\n";
?>

or

<?="Hello world\n" ?> 

{ Pascal, thanks Digi }
Program HelloWorld;

Begin
  Writeln ('Hello World!');
End.

// Delphi, thanks to C0derr
program Project1;
uses
  qdialogs;
const
  s='Hello, World!';
begin
  showmessage(s);
end.

%!
%% Postscript, thanks to Jurgen
/Helvetica 20 selectfont
100 100 moveto
(Hello World) show
showpage

Your code here? :)