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In the first edition of The Design of Everyday Things[0], Norman has a photo of beer tap handles on control levers in a nuclear power plant control room. This was done, to differentiate two important handles.

I won’t link to the photo, because it’s on personal blogs, and I don’t want to hug anyone’s site to death.

The photo was removed, in the current version.

[0] https://en.wikipedia.org/wiki/The_Design_of_Everyday_Things

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I've seen pictures of the cockpit of a large plane where the gear lever has an actual wheel on the end of it.

I think that is exceptional good design.

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A few years ago I listened to a seminar where a few real professional doctors discussed the hospital scenes in movies or TV shows. They mentioned that those dramatic and chaotic operation room scenes where the doctor yells commands with a loud voice look so fake to them. In a real operation room, everyone (including the doctor and the nurses) is highly trained, works in tandem calmly and efficiently -- there's never a need to raise voice.
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There's a big difference between the (controlled) chaos of an ER vs scheduled surgery, but it's still dramatized for TV obviously.
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