Units

As a European country, Greece does the sensible thing and uses metric units throughout the country. They also translate most signs, providing both Greek and Roman transliterations as shown here:



In some cases, however, this can cause some interesting phenomena when the SI standard uses the Greek letters.  I can assure you, for example, that the height of this toll booth allows cars far taller than 2.2 um to go through, but of course it is always a good idea to leave at least 10 um of space between cars as you do so.



(Note for the less-metrically-inclined - 1 um (or micron) is 1 thousandth of a mm or 1 millionth of a meter.  Human hair is about 40-100 um thick)