Arin M. Louis
Arkenbout Gerardus J.
Asami Hazime
Asano Motohiko
Ashton Paul J.
Aslam Muhammed Javed
Asymptote Limited
Ateliers Belges Reunis
Atoiants Vladimir Sergeevich
Audet Denis R.
August Thyssen-Hutte AG
Aukofer John E.
Ault Eldon F.
Aussieker Klaus
AutoChem Instrument Aktiebolag
Autoresearch Laboratories, Inc.
Averin Vitaly Mikhailovich
Ax Wolfgang
Ayusawa Masatake
Azemar Michel