The document outlines the programme for the fourth edition of the Internet Researchers' Conference (IRC19) being held from January 30 to February 1, 2019 in Hyderabad, India. The conference theme is "#List" and will include sessions exploring various dimensions of lists, such as their social, cultural and political implications. Some of the sessions listed include "#StoriesRecordsLegendsRituals", "#ListInterface", "#LegitLists", "#FOMO", "#CallingOutAndIn" and "#LoSHAandWhatFollowed".