Microsoft’s Standard Level Definitions (100 to 400) - https://blogs.technet.microsoft.com/ieitpro/2006/09/29/microsofts-standard-level-definitions-100-to-400/
# Level 100
Introductory and overview material. Assumes little or no expertise with topic and covers topic concepts, functions, features, and benefits.
# Level 200
Intermediate material. Assumes 100-level knowledge and provides specific details about the topic.
# Level 300
Advanced material. Assumes 200-level knowledge, in-depth understanding of features in a real-world environment, and strong coding skills. Provides a detailed technical overview of a subset of product/technology features, covering architecture, performance, migration, deployment, and development.
# Level 400
Expert material. Assumes a deep level of technical knowledge and experience and a detailed, thorough understanding of topic. Provides expert-to-expert interaction and coverage of specialized topics.
# Meeting Boilerplate