What does ow stand for?

Optical Window (NAKS)

Owen's English Common Pleas Reports - A publication (DLA)

Owen's English King's Bench Reports - 1556-1615 - A publication (DLA)

Obere Winkelgruppe - Angles above 45 - German military - World War II

Observation Ward - British

Ocellus Width

Offer Wanted

Office of Water - Environmental Protection Agency (GFGA)

Officer's Writer - British military (DMA)

Office Workouts, Inc. - Commercial firm

Off White (SAUS)

Ohne Wert - Without Value - German

Oil-Immersed Water-Cooled - Transformer (IEEE)

Older Worker

Old Well (SAUS)

Old Wellingtonian - Wellington College - British

Old Welsh - Language, etc.

Old Woman - A wife - Slang

One Way - Fare

On Which - Telegraphy (PCTE)

Open Web (SAUS)

Open Wedge - Osteotomy - Orthopedics (DAVI)

Open Wheel - A publication

Open-Window (SAUS)

Open Wire (NATG)

Open Work (SAUS)

Open Wound (SAUS)

Operand Word (SAUS)

Optical Window (NASA)

Optical World - Medicine - Journal - United Kingdom (EDAA)

Optional Word (SAUS)

Options for Women - Later, Options (EA)

Optometric World - Medicine - Journal (EDAA)

Order Wire - Military (AABC)

Order Writing (IAA)

Ordinary Warfare

Ordinary Welfare (BABM)

Ordnance Workshop (SAUS)

Outer Wing

Out of Wedlock

Oval Window (MELL)

Over-Achieving Women

Overall Width - of the Vehicle - TII (TAG)

Overseas Writers (EA)

Over Water (WDAA)

Over Write (SAUS)

Owners (RIMS)

Owner's Wagons - Shipping

Trans Mountain Airlines - ICAO designator (AD)

Warren Public Library, Warren, OH - Library symbol - Library of Congress (LCLS)

Windsor Public Library, Ontario - Library symbol - National Library of Canada (NLC)