Originally Posted by
daniel.dennin
All caps with the exception of lowercase letters in standard (Y14.38, etc) abbreviations. It all comes down to legibility and conveying information clearly. It is just like avoiding the use of I, O, Q, S, X, and Z.
By the way, for those of us that started off having to know lead hardnesses, that still have erasing sheilds tucked away, I have a question. Is your printing wonderful and your handwriting something along the lines of a serial killer's or is it just me?