static Set<S> stefansOS_technicalFeatures() {
  ret tlft_ciSet([[
    Screenshot
    Full screen on/off
    Switch OS version
    Restart OS
    Exit
    Other module...
    Welcome screen
    Quick module search
    Internal types
    Module classes
    Show source code
    Retranspile
    Find memory leaks
    Remove moduleless frames
  ]]);
}