1. Group of advanced industrialized nations: United Kingdom, France, Germany, Italy, Japan, USA, Canada, and (as from 1998) Russia
   - Group of Seven, G7, G8

Encyclopedia: Group of Eight

• genus Asclepias
• genus Ascophyllum
• genus Asimina
• genus Asio
• genus Aspalathus
• genus Asparagus
• genus Aspergillus
• genus Asperula
• genus Asphodeline
• genus Asphodelus
• genus Aspidelaps
• genus Aspidiotus
• genus Aspidistra
• genus Aspidophoroides
• genus Aspis
• genus Asplenium
• genus Astacus
• genus Aster
• genus Astilbe
• genus Astragalus
• genus Astrantia
• genus Astreus
• genus Astroloma
• genus Astronium
• genus Astrophyton