I would disagree wih The Moon is a Harsh Mistress. The sentient computer just appears, solves the problem facing the Lunar residents, and disappears. Heinlein never explores any of the implications of a "sentient computer", how it just shows up, or what the effects following the Lunar revolution would be.
He hypothesizes about it briefly. You're lead to believe that consciousness is an rare but possible emergent behavior of a system, given sufficient capacity. For example, from chapter 1 -- "Human brain has around ten-to-the-tenth neurons. By third year Mike had better than one and a half times that number of neuristors. And woke up."
But yes, I agree that generally the story is not about computer technology. Science in general is very important to the plot, but not computer science.
I would disagree wih The Moon is a Harsh Mistress. The sentient computer just appears, solves the problem facing the Lunar residents, and disappears. Heinlein never explores any of the implications of a "sentient computer", how it just shows up, or what the effects following the Lunar revolution would be.