There is only a 2 letter abbreviation of Quebec - QC.
Province of Quebec
Proc. is the abbreviation for process.
The three-letter abbreviation for autumn is "AUT." This abbreviation is commonly used in various contexts, such as calendars and weather reports.
wyo.
mem
Province of Quebec
PQ is the abbreviation of Provincial political party,Quebec.
QC is an abbreviation for Quebec
QC
The US Postal Service abbreviation is DE, though Del. is acceptable for use in text.DE is the standard abbreviation for Delaware
pss
PS3
Proc. is the abbreviation for process.
wyo.
CHO
ANG
The 3-letter abbreviation for the amino acid with sulfur in its molecule is Cys for Cysteine.