A
- A2AC - Ann Arbor Ad Club
- A2D2 - Ann Arbor Discovering Downtown
- A2DDA - Ann Arbor Downtown Development Authority
- A2M2PC - Ann Arbor Medical Marijuana Patient's Collective
- A2SO - Ann Arbor Symphony Orchestra
- A3C3 - Ann Arbor Area Crappy Camera Club
- A3SC - Ann Arbor Area Scooter Club
- AAAA - Ann Arbor Administrators Association
- AAABOR, AAABoR - Ann Arbor Area Board of Realtors
- AAACF - Ann Arbor Area Community Foundation
- AAAFFF - Ann Arbor Art Fair Film Festival
- AAAHA - Ann Arbor Amateur Hockey Association
- AAATU - Ann Arbor Area Trout Unlimited
- AABG - Ann Arbor Brewers Guild
- AABOE - Ann Arbor Board of Education
- AABS - Ann Arbor Bonsai Society
- AACC
- AACCOM
- AACMA
- AACT
- AACTMAD
- AADL
- AADW
- AAEA
- AAFF
- AAFM
- AAGA
- AAGIS
- AAHC
- AAHOM
- AAIO
- AAJUG
- AAKC
- AAMRC
- AAO
- AAPAC
- AAPD
- AAPSEF
- AAS
- AASAC
- AASDA
- AATA
- AATC
- AATU
- AAVUG
- AAWA
- AAiO
- AFSCME
- AHA
- AIUM
- AMI
- ASC
- AWC
- AY PAC
M
- MACRHL - Michelle and Camille's Recreational Hockey League
Historic preservation
- AAHDC - Ann Arbor Historic District Commission
- AASHTO - American Association of State Highway and Transportation Officials
- EMU - Eastern Michigan University
- FHWA - Federal Highway Association
- MBPN - Michigan Barn Preservation Network (non-profit)
- MDOT - Michigan Department of Transportation
- MHPN - Michigan Historic Preservation Network (non-profit)
- MSU - Michigan State University
- NAPC - National Alliance of Preservation Commissions (non-profit)
- NPS - National Park Service
- NTHP - National Trust for Historic Preservation (non-profit)
- SHDC - Saline Historic District Commission
- SHPO - State Historic Preservation Office
- UM - University of Michigan
- WCBOC - Washtenaw County Board of Commissioners
- WCDPE - Washtenaw County Department of Planning and Environment
- WCGIS - Washtenaw County Geographic Information Services
- WCHDC - Washtenaw County Historic District Commission
- WCITS - Washtenaw County Information & Technology Services
- WCRC - Washtenaw County Road Commission
- YHDC - Ypsilanti Historic District Commission
