Designing and Building communIT Carlos, CA, Henrique Araujo de Aguiar Cornell University, ca449@cornell.edu Keith, KG, Green Cornell University, keg95@cornell.edu Gilly, GL, Leshed Cornell University, gl87@cornell.edu Trevor, TP, Pinch Cornell University, tjp2@cornell.edu Kevin, KG, Guo Cornell University, kg344@cornell.edu Yeolim, YJ, Jo Cornell University, yj248@cornell.edu Many subgroups in the US remain marginalized from, misunderstood by, or invisible to the larger communities they reside in. Technologies supporting community building, more generally, have focused on apps, but these apps can fall short of making visible and heard subgroups such as the LGTBQ+, immigrant, and black populations. In response to this shortcoming, we report on the design iterations and an early evaluation of communIT—an interactive artifact for making visible and heard subgroups towards building community. To inform the design of communIT, we conducted in our lab a design studio study (N=57), a co-design activity with a to-scale prototype (N= 12), and a co-design activity with a full-scale prototype (N=28). This paper offers a design exemplar of a large-scale, cyber-physical artifact that might support groups in shaping their identities, practices, and roles in the larger community. CCS CONCEPTS • Human-centered computing~Interaction design • Hardware~Emerging technologies • Human-centered computing~Human computer interaction (HCI)~Interaction devices Additional Keywords and Phrases: Media architecture, Architectural robotics, Responsive environments, Cyber- physical systems ACM Reference Format: First Author’s Name, Initials, and Last Name, Second Author’s Name, Initials, and Last Name, and Third Author’s Name, Initials, and Last Name. 2018. The Title of the Paper: ACM Conference Proceedings Manuscript Submission Template: This is the subtitle of the paper, this document both explains and embodies the submission format for authors using Word. In