boards (Project), lists (status columns), cards (nodes, tasks)
Freemium model (as of Aug'2015)
- free gets you pretty much unlimited use, unlimited users
- consumer-Gold $45/yr gets you bigger attachments, emojis, and saved searches
- business version (same per-user price as Gold, but smells like you'll end up buying more licenses, since under the individual-Gold model only board creators would pay) gives you central visibility and control (and bulk exports) https://trello.com/business-class
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