This question prompted me to look for an appropriate tag for books on computers, programming, etc. I'd think these would be described as "reference books," so the "reference" tag would be appropriate. But that doesn't seem to be the way that the tag has been used so far.
I'm thinking maybe I should edit the tag wiki and retag in favor of my interpretation, maybe retag some of the existing questions as "resources" instead of "reference" where appropriate.
Or, my interpretation could be wrong or non-intuitive, in which case we'd need some other tag for writing reference books.
I'm adding simple "Yay" and "Nay" answers for ease of polling the community, but please feel free to answer in length if you've got a more complex/interesting response.