The University of Paderborn provides an Infrastructure-as-a-Service (IaaS) "Regional Private Cloud" based on OpenStack.
To use the regional cloud you have to apply for the decentralized service "Regional Private Cloud" in the service portal, User Selfcare, Additional Services. In our HelpWiki you will find extensive information about this service.
If you are no longer interested in using this service, you can cancel it. Access to the regional cloud will then no longer be possible.
General information on the topic of "cloudcomputing" can be found on the Internet e.g. at wikipedia.org/wiki/Cloud_computing.