Terms and their meanings
An app is a piece of software integrated by qibb and usually offers a user interface or application programming interface. Apps are deployed on top of spaces.
Spaces are virtual environments for apps. They can be used to organize apps in multiple ways, such as in projects, environments, or teams.
A cluster is a group of distributed computing nodes. It combines their computing power, memory & storage into one entity. A cluster is usually sliced into multiple spaces.
A flow is a set of building blocks that process data in sequence.