TechShop used to have a medium sized vacuum forming machine, but it was lost in one of their moves. Those are useful for tool trays. Lay down all the tools for some kit, vacuum-form a tray, and put the tray in a case for the kit. Often used in aerospace, where you want to make sure nobody left a wrench inside the engine or fuel tank.
I grew up seeing these signs all over and never gave them a thought. I love articles that bring something to my attention that I never thought to think about.
TechShop used to have a medium sized vacuum forming machine, but it was lost in one of their moves. Those are useful for tool trays. Lay down all the tools for some kit, vacuum-form a tray, and put the tray in a case for the kit. Often used in aerospace, where you want to make sure nobody left a wrench inside the engine or fuel tank.
[1] https://www.youtube.com/watch?v=lCvgvWiZNe8
Aside: If you are a sign aficionado the American Sign Museum in Cincinnati will make you very happy: https://www.americansignmuseum.org/
Comparing the US and the Netherlands - the US seems much more chaotic and organic than the Netherlands with its unified government standard typeface.