Sonia Moreno, Hugh Potter, and Narun Raman presented the poster "ALCH: An Imperative Language for the Chemical Reaction Network-Controlled Tile Assembly Model," by Titus H. Klinge, James I. Lathrop, Sonia Moreno, Hugh D. Potter, Narun K. Raman, and Matthew R. Riley, at the Twenty-fifth International Conference on DNA Computing and Molecular Programming in Seattle, WA, August 5-9, 2019.