One session, three talks. Tony Arcieri – A Crash Course on Celluloid: This talk will provide a quick overview of how to use Celluloid, covering the basics of how to add Celluloid to your program and begin leveraging its concurrent features. Chris Eppstein – Naiveté: Stepping outside your comfort zone. Sarah Mei – MRI Internals: How does a language become a language? We'll take a peek into the internals of the MRI, and explore how it came to be.