http://www.businessinsider.com/wayfindr-google-backed-blind-navigation-approved-un-trials-2017-9
origin - http://www.pipiscrew.com/?p=10249 a-google-backed-project-to-help-blind-people-navigate-with-smartphones-got-a-boost-from-the-un
http://www.businessinsider.com/wayfindr-google-backed-blind-navigation-approved-un-trials-2017-9
origin - http://www.pipiscrew.com/?p=10249 a-google-backed-project-to-help-blind-people-navigate-with-smartphones-got-a-boost-from-the-un