I went to wikipedia looking for the symbol/abbreviation for ton.
t would be ambiguous since there is both a
short ton and a
long ton, which mean two different weights.
I cannot find a standard abbreviation to eliminate this ambiguity. Granted, "ton", as a word, is so short you wouldn't need to abbreviate it. Yet, by itself, it is not clear to which type of ton you're referring.
I was able to find abbreviations for all other units except for short ton and long ton. I'm hoping someone here knows what the proper abbreviations are.