$model = Mage::getModel('catalog/product')->load(12);
$model = Mage::getModel('sales/order')->load(1000001, 'increment_id');This example loads the order model with the increment ID of 1000001. It retrieves the order data from the database using the increment ID as the identifier. The package library for this example is 'sales'. It is loading the 'order' model from the sales package within Magento.