deletions | additions       diff --git a/Columnar_containers_Columnar_containers_are__.md b/Columnar_containers_Columnar_containers_are__.md  index 0aa5834..07b405f 100644  --- a/Columnar_containers_Columnar_containers_are__.md  +++ b/Columnar_containers_Columnar_containers_are__.md 
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## Columnar containers  Columnar containers are very different than record-oriented containers. We should discuss both. The question is - do those both go in one section, or in two? I think one section on "Data Tables" makes sense. Record-oriented approaches dramatically predate column-stores in "serious" data science.[Dav - I can't figure out how to use chat, which is where this probably belongs. Stefan - chat is temporarily broken; I notified the team and they're working on it. -- Stéfan -- Chat is working now] New text.