In Testersuite you can find the products and requirements 
that are going to be tested in a Test cycle and manage them in the Products & Requirements module. There is a direct link to the products and requirements tree in the overview screen of Test cycle.
You can build a hierarchy of products. In this way you can record the (sub) processes and/or the (sub) systems (applications) in the form of a tree. See further: Products
Requirements actually describe the requirements for the functional operation of the (sub) processes and/or the (sub) systems. But also for non-functional requirements, for example with respect to performance or security, requirements can be defined. See further: Requirements
From the Main Menu you can open the list of products or the list of requirements.