WAA
WAA commonly refers to the Web Analytics Association, a professional group for online measurement, and to Windows Administrator Authentication, a security feature in Microsoft environments; it is also used for regional water‑sharing agreements.
Medical
Miscellaneous
World Assembly on Ageing
When Artists Attack
Werkgroep Artsen Advocaten
Wisconsin Alternate Assessment
Wreaths Across America
Warm Air Advection
Week Arranged in Advance
Work Assignment Area
Community
Western Arts Alliance
Wavelet Analysis and its Applications conference
World Aluminum Abstracts
World Apheresis Association
Wisconsin Arborists Association
Governmental
Weak Affirmative Action
Wisconsin Automotive Aftermarket
Winnipeg Airports Authority
World American Airlift
Wien Air Alaska
Wartime Aircraft Activity
War Assets Administration
Wabash Motor Freight Tariff Association
Academic & Science
Writing for Academic Applications
Winthrop Alumni Association
Washington Area Astronomers
Westchester Amateur Astronomers
Western Amateur Astronomers
Waris, Papua New Guinea (Seismograph station code)
Wisconsin Alumni Association
Wiener Arbeitsgemeinschaft für Astronomie
Wisconsin Arborist Association
Regional
Computing
Business
Washington Association of Accountants
World Artists Association
Wireless Airport Association
Welded Aluminum Alloy
Water-Augmented Air jet
The World Atlatl Association, Inc.
Western Awning Association
Worker Adjustment Assistance
Wam Active Ltd
Wisconsin Apartment Association
Wisconsin Aquaculture Association
World of Art and Antiques
Washington Apartment Association