I think you neglected an important category: (6) Building Things (physical things) For me, the two biggest responses when posting stories to HN were both wood

I think you neglected an important category: (6) Building Things (physical things) For me, the two biggest responses when posting stories to HN were both woodworking related projects w/instructions. http://news.ycombinator.com/item?id=1906181 http://news.ycombinator.com/item?id=1906181 http://news.ycombinator.com/item?id=1027994 http://news.ycombinator.com/item?id=1027994