Post Categories

I'm working on how to divide our posts up into the categories of the calculator... transportation, etc... one way to do this might be to enter whatever section we're working on (refrigerants, transportation, energy, etc) into the "Labels for this post" section that appears at the bottom right of the box when you're entering a new post. This would not categorize our posts on the main blog, but we could click on a label and see all other posts with that label together, thus providing us a way to track progress overall and within each section. As an example, I've labeled this post and my first post with the word "General." Click on this word and you can see how this system would work. Let me know what you think.