I spoke with Mark Noel the Managing Director of Professional Services for Catalyst, a provider of litigation support software and services. Before joining Catalyst, Mark co-founded an e-discovery software start-up and was an intellectual property litigator with Latham & Watkins in Washington, DC. We discussed the evolution of technology-assisted review, how to properly define it, why continuous active learning and contextual diversity sampling are critical, and uses of this application beyond document review.