Possible meanings, OWM:

Of Water Management
Of War Mobilization
Old World Masters
Of Wastewater Management
Owners Workshop Manual
Office of Water Management
Organization and Working Methods
Oswal Woollen Mills
Occipital White Matter
Ostomy Wound Management
Oil Weathering Model
Office of Weights and Measures
Office of Workforce Management
occipital deep white matter
Old White Males
One World Music
Open Wheel Modified
Oracle Workspace Manager
Open Wheel Modifieds
Office of Wireless and Mobility
Oregon Wine Merchants
Ostomy Wound Managment
Obscure Weak Magenta
Odfjell Well Management
Office of Wastewater Management
Office of Watershed Management
Onford and Watson Mine
Oxford and Watson Mine

(Source: http://www.acronymattic.com/owm.html)

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With over 20 years in the brokerage business, Tracy Fogarty has helped thousands of clients achieve their goals on both sides of the negotiation table. Creative and result oriented professional, Ms. Fogarty strives on honest communication, value proposition, the big picture perspective, and bottom-line profitability.