What does 73 stand for?

73 stands for "Best Regards (not an acronym)"

How to abbreviate "Best Regards (not an acronym)"?

"Best Regards (not an acronym)" can be abbreviated as 73

What is the meaning of 73 abbreviation?

The meaning of 73 abbreviation is "Best Regards (not an acronym)"

What does 73 mean?

73 as abbreviation means "Best Regards (not an acronym)"