One of the marvelous things about Discworld is that although it is absurd, it is one of those logical abstractions of technology I've seen. For example he describes in an incredibly lifelike way the clacks system (basically a kind of internet) and it's many properties - the network effects of internet infrastructure, it's used in commerce, the importance of information, the "hackers" who manipulate it, etc. Discworld is almost really hard scifi sometimes.