Object List 
A list belonging to a service contract item in which objects are entered, for which the contractual services specified in the service contract item can be claimed. Installed bases, installed base components, objects, and products can be used, for example, as elements of this object list.
Note
Whether or not the object list is displayed depends on the item category that is assigned to the service product in the service contract item. If, for example, the item category is one that was defined for service contracts or service plans, the object list appears.
Integration
Business Transactions in Service
The object list is used by business transactions in service to determine service contracts. Provided that this type of contract determination is set up in Customizing, the service contract items with an object list containing the reference object are determined when a business transaction is created. For more information, see Service Contract Determination.
Installed Base Management
After an installed base or installed base component is entered in the object list, in installed base management, you can display all available contract data for each installed base and check the contract assignment. For more information, see Assigning Service Contracts to Installed Bases.