Package Mage\Cron

Classes summary
Mage_Cron_Helper_Data	Cron data helper
Mage_Cron_Model_Mysql4_Schedule	Schedule mysql4 resource
Mage_Cron_Model_Mysql4_Schedule_Collection	Schedules Collection
Mage_Cron_Model_Observer	Crontab observer
Mage_Cron_Model_Resource_Schedule	Schedule mysql4 resource
Mage_Cron_Model_Resource_Schedule_Collection	Schedules Collection
Mage_Cron_Model_Schedule	Crontab schedule model

Exceptions summary
Mage_Cron_Exception	Magento Cron Exception