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I write software for my experience design company ( https://www.facebook.com/oleindia/ ). I first heard of Category Theory through the book Topos of Music, about ten years ago. More recently, I was exposed to it when I started learning a bit of Haskell. I found Bartosz's blog quite interesting.
I would like to learn enough Category Theory to understand and work on Conal Elliott's ConCat ( http://conal.net/papers/compiling-to-categories/compiling-to-categories.pdf ). Any tool / perspective that would help in making robust systems would be a win.