3-D 45 x 107 format 6 x 13 format 7 x 13 format 8 & 9 8.5 x 17 format 9 x 12 format 9 x 14 format 9 x 18 format Achromatic lens Achromatic Mirror Stereoscope Achromatic Stereoscope Achromatic Table Stereoscope Additive colour Album Magique Album stereoscope Albumen print Alternascope Ambrotype American Novelty Company American stereoscope American Stereoscopic Company Amphitype Anthony, E. & H.T. Apédioscope Apéscope Appleton & Company, D. Art Nouveau Astra Auto-Stéréoscope Autochrome Beau patent