ERP (or Enterprise Resource Planning) is a category of software that manages the various functions across your business, in one system. Take a step back and think about all the processes that are essential to running your business – accounting, sales, inventory, purchasing, manufacturing, service, etc. The list goes on based on your business structure. Most small and mid-size companies have a separate application for each of these processes. ERP software changes that approach – it integrates all the functions across your entire organization into one system.