This document summarizes a presentation about DevOps lessons learned. It discusses that DevOps can provide higher business value than expected, benefits both development and operations teams, and requires high-trust management. It also notes that DevOps is applicable to all types and sizes of organizations, not just large tech companies, and shares an example of a COBOL application adopting DevOps practices across 20 technology stacks. The presentation encourages attendees to learn more about an upcoming DevOps Enterprise Summit for organizations applying DevOps.