@Jarvist @physicssteve If we focus on hashtags, I’d say #condensedmatter or something similar. Then, other hashtags might be able to be used for sub-categories (#FermiLiquids , #TopologicalInsulators , etc). We could also base it off arXiv notation; so #cond-mat , with sub categories like #str-el .

Although the Raspberry PI idea sounds interesting, I don’t know if I’d have the time to properly set up and manage something that technical.