Cloudpak in general is pre-integrated solution of IBM Middleware products on Redaht OCP. Each Cloudpak is a platform bundle for specific use cases, currently we have 6 Cloudpaks - Application, Data, Integration, Automation, Security and Multicloud Management.
* CP4A (Application) includes Application Development related products and frameworks : API Connect, Websphere Liberty etc
* CP4D (Data) includes Data and Analytics related products : DB2, Infosphere, Datastage, WML etc
* CP4I (Integration) includes integration related products : MQ, Event stream, IIB etc
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Regards,
Mahesh