I'm sitting here staring at my US keyboard and scratching my head. All of the Menu shortcuts align perfectly with the UK keyboard's iconography but not the US keyboard which opts for labels. And why do we have a key labeled both enter and return?
On the MBP I'm typing this on, the key is labeled enter in small type and below that return in larger type. I think holding down the fn key and pressing that key does the enter action, while without fn it does the return action. I am pretty sure my full-size Mac keyboard has return on the main keyboard and enter on the numeric keypad. I think the Lisa was the same.
IIRC there was no Enter key on the original (128K) Mac keyboard, but the optional numeric keyboard had the Enter key.
Apple have an old user interface guideline that basically said that the main keyboard was for primarily typing text, while traditional data entry was secondary. Hence the function of the Return key was strictly to insert a carriage return into some text. And so no Enter or Control key on the original keyboard. As a kind of substitute Apple introduced the Command (Swedish campground) key, but it wasn't a direct mapping of Control. And IBM further muddied the waters by introducing CUA. By the time of the Mac II the default keyboard was much more compatible with common computers. It was a time of rapid change.
I don't really understand why this is done, since well-made symbols are also understandable for illiterate people or those not speaking the language.
On the other hand having to read all that in text while you're riding by isn't very reasonable either. Complex signage is only as good as your knowledge of it, which maybe is why passing a driving test in Europe is so much harder; it requires knowledge we just get from being able to read in the US.
Only bicycles
>2. a bicycle on a white circle outlined in red
No bicycles.
>3. a bicycle on a blue [rectangle]
Recommended route for bicycles.
That being said, traffic signage is a mixture of both, where some meaning is given by convention (e.g., white background and red border means "not allowed"), and then extrapolated by pictograms (bicycles not allowed, trucks not allowed, pedestrians not allowed).
Edit: A certain cultural context is of course always required, to know for example that a crossed out cigarette applies to smoking in general and doesn't mean that you can smoke pipes, cigars, or bongs. Such 'misunderstandings' only happen with QA engineers though. ;)
But really, if you're driving then you should have done a driving exam and test in your home country. Then you're ready to drive from Romania to Ireland (with the help of some tunnels and ferries) and be able to manage reading the road signs the whole way. This is possible because of a (mostly) shared iconography. Of course, on a bike you don't need to pass a test but you should do a little bit of studying to make sure you don't get a fine.
The US doesn't need this because it uses English.
This is also completely distinct from keyboards which aren't even QWERTY across Europe. There are also AZERTY (France) and QWERTZ (Germany) and some countries like Belgium have all three in the same office as people have different preferences. And pair programming is as painful as you can imagine.
white circle with red outline: something that is forbidden (the road is forbidden for bycicles)
the last one indicates a bycicle-only path crossing the road, 150 meters before it you should see a white triangle outlined in red ("danger") with a bycicle inside it