OK, let's get this one back into play. smile

How come that calculators, and numerical keypads on computer keyboards have 7-8-9 along the top row ... whilst telephones, mobile phones etc. have 1-2-3?

Which is better (more intuitive, or logical), and which should medical equipment use? Assuming, that is, that we want to standardise.

Meanwhile ... I have two "well known" infusion pumps right here in the workshop. One has the 1-2-3 layout whilst the other has (yes, you've guessed it) the 7-8-9.

If you don't inspect ... don't expect.