This document provides an introduction to Mesos and Mesosphere. It begins with presenters and an agenda. It then defines Mesos as a cluster manager that pools server resources and a scheduler that dispatches workloads. Mesos components include a master, Zookeeper, and agents. Mesos supports generic and framework applications. Mesosphere was founded to deliver Mesos for enterprises and provides a datacenter operating system with rich ecosystem. The document demonstrates how EMC Code integrates persistent external storage with Mesos and Mesosphere through projects like REX-Ray and mesos-module-dvdi. It concludes with an invitation to ask questions.