Introducing the track, this talk will define terminology and introduce the mental models needed to make sense of sustainability as a non-functional requirement for developing and operating systems. Sustainability includes measuring and reducing your carbon footprint, water stewardship, social responsibility in supply chains, and recycling to create a circular economy. This applies to the direct impacts of IT workloads, but in many cases, we are creating new IT workloads to measure and increase the sustainability of physical products that have a much larger impact. From an IT perspective, we have tended to focus on moving to sources of renewable energy, but we also need to take into account the embodied carbon and water usage of all the manufacturing, delivery, and operation processes for datacenters and devices.