Auth Represents authentication helpers provided by Postman.

AuthAttribute Represents an attribute for any authorization method provided by Postman.

Cert An object containing path to file certificate, on the file system.

Certificate A representation of an ssl certificate.

Collection .

Cookie A Cookie, that follows the [Google Chrome format](https://developer.chrome.com/extensions/cookies).

Event Defines a script associated with an associated event name.

Header Represents a single HTTP Header.

Info Detailed description of the info block.

Item Items are entities which contain an actual HTTP request, and sample responses attached to it.

ItemGroup One of the primary goals of Postman is to organize the development of APIs.

Key An object containing path to file containing private key, on the file system.

ProtocolProfileBehavior Set of configurations used to alter the usual behavior of sending the request.

ProxyConfig Using the Proxy, you can configure your custom proxy into the postman for particular url match.

Response A response represents an HTTP response.

Script A script is a snippet of Javascript code that can be used to to perform setup or teardown operations on a particular response.

Variable Using variables in your Postman requests eliminates the need to duplicate requests, which can save a lot of time.