Exploring Indico, as an example CERN operational application, to test the Solid principles. Suggestions by the Indico project leader Pedro Ferreira: Develop a PoC (Proof of Concept) of the Indico registration form module, in which registration data belongs to the user and not to Indico. Especially useful, given that, in certain events, people may be asked, for instance, to send a scan of their ID, a kind of information one wishes to keep control of and be able to erase.; Enrich Indico meeting pages with some kind of Solid-based content, such as comments. Such data should better not be kept in Indico and not very critical for continuous availability. The advantage of this development is that it could be tested non-intrusively.