CHAPTER 5 ■ NUMBERS AND UNITS
Alternative for Greek Micro
One last comment on powers-of-a-thousand: The abbreviation for millionths is the Greek letter mu, m. If “m”
is not available in a font, the letter “u” is often substituted (see Figure 5-3). For example: 10 u is the same as
10 m (which is the same as 0.00001)
Figure 5-3. Some markings use the English letter “U” instead of the Greek letter “m”