i want to what is the sap i am presenltly working in finance orgination sap is useful to us please tell me?

Answer 1

http://en.wikipedia.org/wiki/SAP_AG
says
"the largest European software enterprise and the third largest in the world, with headquarters in Walldorf, Germany."

("Systems, Applications and Products in Data Processing").
products focus on Enterprise Resource Planning (ERP),
ERP is the one of five major enterprise applications that makes up SAP's Business Suite. The four other applications are:

customer relationship management (CRM) - helps companies acquire and retain customers, gain deep marketing and customer insight, and align organization on customer-focused strategies
product lifecycle management (PLM) - helps manufactures with a single source of all product-related information necessary for collaborating with business partners and supporting product lines
supply chain management (SCM) - helps companies enhance operational flexibility across global enterprises and provide real-time visibility for customers and suppliers
supplier relationship management (SRM) - customers can collaborate closely with suppliers and integrate sourcing processes with applications throughout the enterprise to enhance transparency and lower costs

their website is
http://www.sap.com/usa/index.epx