What does HWW stand for?

Hans W. Wynholds Co. - Commercial firm

Headlamp Wash and Wipe (ODA)

High Wind Warning - Telecommunications (OTD)

Horan, Wall & Walker - Publisher (ADA)

Hot and Warm Working (SAUS)

H. W. Wilson Co. - Publisher

Seahawk Marine, Seattle, WA - Manufacturer code for watercraft hull identification number (USCG)