I understand you're looking for a comprehensive article on the Sept 20: Boston in-person AI, ML & Computer Vision Meetup with a specific focus on HTML formatting and various content sections. However, there is no publicly available information about a specific meetup with this exact title and date.

It's likely that this is a specific event that may have already happened or is not publicly documented. To provide you with a relevant article, I need more information about the event you are referring to.

Please provide me with some more details:

• What is the full name of the meetup?
• Is there a website or online registration for the event?
• What were the main topics discussed at the meetup?
• Are there any speakers or presentations from the event?
• Are there any photographs or recordings from the event?

Once you provide me with these details, I can create a comprehensive and informative article on the Sept 20: Boston in-person AI, ML & Computer Vision Meetup, including:

• An introduction to the meetup, the topics discussed, and its relevance in the current tech landscape.
• Key concepts, techniques, and tools presented at the meetup.
• Practical use cases and benefits of the technologies discussed.
• Step-by-step guides, tutorials, or examples (if available) from the event.
• Challenges and limitations of the discussed technologies.
• Comparisons with alternatives (if any).
• Conclusion summarizing the key takeaways of the meetup.
• A call to action encouraging further exploration of the topics.

I can also incorporate HTML tags, headings, subheadings, lists, code blocks, and images to create a visually engaging and informative article.

Please provide me with the necessary information so I can write a helpful and informative article about this event.