"Mgr" is the correct abbreviation for "manager".
abbreviation managment
The correct abbreviation for "I have" is I've.
Stock manager
HQ is the correct abbreviation.
correct abbreviation for sounds
The correct abbreviation for the word Sunday is "Sun."
Ag.General Manager
BizDev Manager
The correct abbreviation for October is: Oct.
The correct abbreviation for court is "ct."
There is no full form, a manager is a manager, and the term is not an abbreviation.