What does X-Bar stand for?

X-Bar stands for "Crossbar telephone exchange"

How to abbreviate "Crossbar telephone exchange"?

"Crossbar telephone exchange" can be abbreviated as X-Bar

What is the meaning of X-Bar abbreviation?

The meaning of X-Bar abbreviation is "Crossbar telephone exchange"

What does X-Bar mean?

X-Bar as abbreviation means "Crossbar telephone exchange"