What does URW stand for?

Sop - Language code (ETLW)

Ultrasonic Ring Welder

Union of Rubber Workers (SAUS)

United Racquetsports for Women (EA)

United Rubber, Cork, Linoleum, and Plastic Workers of America (EA)

Ural - Former USSR - FAA designator (FAAC)

You Are Welcome - Telecommunications (ACOL)