All Brands
- A & D Weighing
- A. Daigger
- Abraxis
- Absolute
- Accu Standard
- Accuform
- Accumet
- Ace Glass
- ACL Incorporated
- Adam Equipment
- Adenna Glove
- Advanced Instruments
- Advantec
- Advantech Manufacturing
- Affymetrix - USB
- Agilent
- Ahlstrom
- Air-Tite Products
- Airgas
- Airlite Plastics Company
- Akro
- Alconox
- Aldon Corporation
- Alfie Packers
- Alpha Biosciences
- Alpha Resources
- Am San
- Ambion Division of Applied Biosystems
- AMD Ritmed
- Amerex Instruments
- Ametek Brookfield
- Ametek Petrolab
- AMK Glass
- Ampac
- Amresco
- AmScope
- Analytical Services
- Analytical West
- Anchor Hocking
- Andwin Scientific
- ANKOM
- Ansell
- Anton
- Anton Paar
- AP Graph
- Apera Instruments
- Applied
- Aqua Solutions
- AquaPhoenix
- Argos Technologies
- Arizona Instruments
- ASI Standards
- Associated Bag
- Atago
- Atlantic Ultraviolet
- Avanti Polar Lipids
- Avidity
- Awareness Technologies
- Axygen
