What does the abbreviation aco stand for in aco hardware stores?

When I was young I remember many ACE Hardware stores in the Detroit metro area. Many years ago, maybe the 70's, I noticed a few new hardware stores opening named A.C.E. Hardware. I was confused, why some stores were ACE Hardware and others were A.C.E.?

I found out A.C.E. was a rival store to ACE Hardware. A.C.E was confusing costumers with their name so they would shop at A.C.E. thinking it was ACE Hardware.

A.C.E. believed the periods in their name was enough legal difference but it wasn't. Ace Hardware sued A.C.E. stating their name was too similar to ACE Hardware. They won the law suit. That's when A.C.E changed their name to A.C.O. Hardware. It was easier and cheaper to change one letter in the name. As years went by I've noticed they dropped the periods and are named ACO Hardware.

So there is or was no meaning for ACO. It was an easy name change from A.C.E.