</code>.</li>
<li>**<code>ARG$</code>** – A string containing the command line arguments passed to the current process.</li>
<li>**<code>PROGRAM$</code>** – A string containing the fully qualified path of the current program.</li>
<li>**<code>GRAPHICS_WIDTH</code>** – An integer containing the width of the graphics screen</li>
<li>**<code>GRAPHICS_HEIGHT</code>** – An integer containing the height of the graphics screen</li>
<li>**<code>GRAPHICS_CENTRE_X</code>** – An integer containing the X coor