Client 

Definition

A commercially, organizationally, and technically self-contained unit within an SAP System. Clients have their own master records and set of tables.

The definition of the client organizational unit is obligatory.

Use

The client is the highest level in the SAP System hierarchy. Specifications that you make, or data that you enter at this level are valid for all company codes and for all other organizational structures. You therefore only need to make these specifications, or enter this data once. This ensures that the data is consistent.

Users must enter a client key when they log on to the SAP System. This defines the client in which they wish to work. All the entries you make are saved per client. Data processing and analysis is also carried out per client.

This means that you cannot include customer accounts from different clients in one dunning run.

Access authorization is assigned per client. You must create a user master record for each user in the client where he or she wishes to work.

The SAP System is delivered with the clients 000 and 001 - these clients already contain default settings. For more information, see Setting Up Clients in Customizing. These sections are automatically selected when you create your implementation projects (company IMG, project IMG).