Aṣ-ṣifr, [57], [58]

Astrological numerals, [150]

Atharva-Veda, [48], [49], [55]

Augustus, [80]

Averroës, [113]

Avicenna, [58], [74], [113]

Babylonian numerals, [28]

Babylonian zero, [51]

Bacon, R., [131]

Bactrian numerals, [19], [30]