Hi Chirstopher,
SAP ERP -SAP ERP is enterprise resource planning software developed by the German company SAP SE. SAP ERP incorporates the key business functions of an organization. The latest version (SAP ERP 6.0) was made available in 2006. The most recent Enhancement Package (EHP7) for SAP ERP 6.0 was released in 2013
SAP ECC - SAP ERP Central Component (ECC) - That is the part of ERP component where ECC is the central component where over it any system can be made with other component / module.