# Operations
source: https://developer.mastercard.com/mastercard-processing-core/documentation/api-basics-section/operations/index.md

This section describes the core operations related to Mastercard Processing services:

* Create objects in the CMS, including client, account contract, card contract, and basic setups.
* Retrieve and update data related to clients, their accounts, and cards.
* Issue, renew, or replace virtual and physical cards.
* Activate cards.
* Set PINs.

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The following are core operations linked to relevant CMS objects:

![](https://static.developer.mastercard.com/content/mastercard-processing-core/uploads/processing_5.png)