This is probably slightly irrational, but it pains me to see how many slide rules go unsold at auction sites, and probably end up being thrown away. Admittedly, most of these are school rules of which there are thirteen in a dozen, but I see a fair number of nice ones as well. The collector in me wants to buy them all, but the rational Pinus says that I already have a few, and unlike the gentleman in the article, I do not wish to fill my home with slide rules...

To put a programming angle on things: Using a slide rule feels a bit like assembly-language programming on something like the Z80. Since operations can only take their input from certain places, and only leave their output at certain places, you need to try to arrange things so that any intermediate results are in a place where they can be used as input for the next step.