Query ERP

Hello all, anyone to know the main differences between the following ERP, SAP and QAD.

Thanks very much.

QAD is fully integrated, modular ERP (Enterprise Resource Planning) software which has a flexible and open-ended architecture that supports core business operational functions such as marketing, manufacturing, sales, procurement, accounts payable, distribution, accounts receivable, and human resources. ERP is structured into modular components where all modules are fully integrated, streamlining the supply chain, order fulfillment, sales, human resources and other business processes. This structure of multiple business functions creates synergies among functional departments reducing time, energy, costs, and resources within an organization.