What does PSO stand for?

PSO stands for "Postman's Sorting Office"

How to abbreviate "Postman's Sorting Office"?

"Postman's Sorting Office" can be abbreviated as PSO

What is the meaning of PSO abbreviation?

The meaning of PSO abbreviation is "Postman's Sorting Office"

What does PSO mean?

PSO as abbreviation means "Postman's Sorting Office"