What is client in sap

 A client is organizational and legal entity in the SAP system.All the business management data is protected here because other client can not access them .The main objective of the client is to keep the data unique.The data in a client only visible with in the client,it cannot be change or display from another client.

SAP system there can be multiple clients.SAP R/3 comes with 3(three) Default client.

SAP Clients

Client    000 - Master client

Client    001 - Copy of master client

Client    066 - Early watch client

Client 000 Master Client. Special client in SAP System.It contains all standard configurations,parameters,standard transactions,.etc.SAP R/3 comes with Organizational structure.

Client 001 Copy of master Client. Client can be customized  to prepare in to move it into the Production environment .once 001 client Customized ,it does not behave like Client 000.

Client 066 Early watch Client. Service for customer systems,

Note: One impotent thing to remember is that during  SAP R/3 System implementation ,Once SAP installed ,the first thing to be done is copy standard client include in SAP R/3 package. SAP Users can start using the SAP for creating ,testing,training,or  even start using it for customization with one SAP instance ,a number of  Clients can be created.no need to install separate software for each and every customer .It provide unique.one client cannot see the data of another client.As depicted above 300 and 500 client exist under one roof.We can create number of Client in SAP application 

(From 000 to 999).