- Anderson News and Merchandisers
- AndVista
- Anheuser Busch
- Answers Systems Inc.
- Apogado CVBA
- Appasamy Ocular Devices (P) Ltd.
- Applied Logic, Inc
- Apriso
- Arizona State University
- Ark Bokhandel AS
- Arquest, Inc.
- ARS Interactive
- ARTED
- Article Numbering Center of China
- Ascendia Brands
- Ascension Health
- ASD Specialty Healthcare, Inc.
- ASDA WalMart
- Associated Wholesale Grocers
- Association for Healthcare Resource and Materials Management (AHRMM)(IBA)
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- Association of Coupon Professionals
- Association of Floral Importers of Florida, Inc.
- AstraZeneca Pharmaceuticals
- AT&T
- AT4 wireless, S.A.
- ATMS plc
- Atos Origin
- Atos Worldline
- Auchan France
- August Storck KG
- Australia and New Zealand Banking Group Limited (ANZ)
- Australian Food and Grocery Council
- Australian Red Cross Blood Service
- Auto-ID Labs
- Auto-ID Labs at KAIST
- Auto-ID Labs at Keio University
- Auto-ID Labs at MIT
- AutoID Labs at Fudan University
- AutoIDExpert Scandinavia
- Avendra, LLC.
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