Is registering the autoloader needed zend_loader::registerAutoload()

[intensecool]

I'm guessing this line registers the autoload function, which in turn loads needed Zend classes.\[code\]Zend_Loader::registerAutoload();\[/code\]My question: is this line meant to be used in applications that call some zend components but aren't fully zend applications? or is needed also in applications that are fully zend and use zend MVC?