This paper presents narrative pictograms, diagrams designed to convey the abstract concepts of a software agreement. Narrative pictograms arose out of a need to increase the chance that subjects of any culture or language could understand the purposes and intent of a consent agreement accompanying publicly available experimental software. Accordingly, the diagrams presented in this paper are designed to be used without the aid of explanatory text. We first present our iterative design process and initial formative evaluation of the diagrams. We then present example diagrams designed to describe the data collection policies of research software, and the more general composition rules used to create them. Finally, we demonstrate the diagrams’ ability to effectively communicate concepts by presenting results from an experimental study based on the ISO 9186-1 comprehension test for graphical symbols. Author Keywords Informed consent, pictograms, wordless diagrams, open source ACM Classi...