Which is not List the major built-in objects in ASP.NET?

Below are the major build in objects in ASP.NET:

Application - It stores the information related to the entire application. So it is not specific to users. It was complete application oriented.
Request - It describes the methods, properties, and collections of the object that stores information related to the HTTP request
Response - Based on the Request the answer we got from the server is called response.
Server - Server is the Physical system, With these methods you can execute code, get error conditions, encode text strings, create objects for use by the Web page, and map physical paths.
Session - Session will store the user details and values and sent across with request and get response.
Context - Provides access to the entire current context (including the request object).
Trace - Provides a way to display both system and custom trace diagnostic messages in the HTTP page output