30th ACM Conference on Hypertext and Social Media (HT'19) 17-20 September 2019 | Hof, Germany https://human.iisys.de/ht2019/ Twitter: @ACMHT - https://twitter.com/ACMHT Hashtag: #acmht19 2019 - the year of anniversaries: Time to reflect and look ahead. - 30th Anniversary of the fall of the Berlin Wall - 30th Hypertext Conference - 30th Anniversary of the WWW -…