Arpentage, [6], [68], [135], [505]

Artillerie, [64]

Arts (Beaux), [159], [419]

Arts mécaniques, [69]

Arts militaires, [70]

Aryabhata, [121]

Assemblées délibérantes, [95]

Assurances, [67], [529]

Astrologie, [218]

Astronomie, [84], [513]