There are still a few companies that make them. Called "slide charts", since they come in many forms besides just the "rule" form.
I look into having them made every now and then, but it seems like the minimum order quantity is almost universally 500. It would be nice if there was a modern style of e-print service for smaller quantities.
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Cardboard slide rules of various times--often used as advertising--used to be very common for calculations and/or lookup tables.
There are still a few companies that make them. Called "slide charts", since they come in many forms besides just the "rule" form.
I look into having them made every now and then, but it seems like the minimum order quantity is almost universally 500. It would be nice if there was a modern style of e-print service for smaller quantities.