Magento get system Configuration value

In magento if we need to fetch any data from system -> Configuration section then we just need to use below code

<?php 
echo Mage::getStoreConfig('design/footer/copyright') 
?>

here is explanation what each section indicates

<?php 

echo Mage::getStoreConfig('section/group/field')

// section indicates section on left sidebar
// group indicates name of fieldset
// field indicates fieldname

 ?>