We are excited to invite you to participate in the 25th ACM Conference on Hypertext and Social Media, 1–4 Sep 2014, in Santiago, Chile. The venue of the conference is the Central Campus of PUC Chile, located right by some of the most visited places in Santiago such as the Lastarria neighborhood, Santa Lucia and San Cristobal hills, Bellas Artes Museum and neighborhood, and La Moneda Presidential Palace. During the conference you will find and enjoy: 2 amazing keynote speakers: - Cesar Hidalgo, Macro Connections Group, MIT Media Lab - Ricardo Baeza-Yates, VP of Research, Yahoo! Barcelona, Spain 19 full papers and 16 short papers http://ht.acm.org/ht2014/index.php?conference.accepted_papers 16 posters and demos http://ht.acm.org/ht2014/index.php?conference.accepted_posters 3 Workshops - DataWiz: Workshop on Data Visualization. http://datawiz2014.di.unito.it/ - LinkQS: Workshop on Linking The Quantified Self. http://linkqsws.wordpress.com/ - SP 2014: Workshop on Social Personalisation. http://columbus.exp.sis.pitt.edu/sp2014/ 2 tutorials Matrix Algorithms in Social Recommendation Systems by Kunpeng Zhang, University of Illinois, Chicago and Evaluating Recommender Systems: Ensuring Replicability of Evaluation by Alejandro Bellogín, Universidad Autónoma de Madrid, Spain and Alan Said, Centrum Wiskunde & Informatica, Netherlands To register, visit http://ht.acm.org/ht2014/index.php?venue.registration Find more information at the official conference website http://ht.acm.org/ht2014/ or the Facebook group https://www.facebook.com/acm.ht2014 We look forward to see you in Santiago in September! Denis Parra Local and publicity chair ACM Hypertext 2014 Assistant Professor, CS Department School of Engineering, PUC Chile http://web.ing.puc.cl/~dparra/