This is a black and white image of a set of Napier's bones abacus cards arranged vertically against a black background. The 10 numbers labeled on each card, from left to right, are "1 2 3 4 5 6 7 8 9 0". Each card has a series of numbers between each set of 10 diagonal black lines. The "0" card on the extreme right of the image is blank and has no numbers or diagonal lines. Written on the verso side in blue pen is "3846/8" and in black pen "10/1, p.61". Also written in verso side in pencil is "E.Tomash Figure 11". There was a "15" written but has been crossed off. Written on on the white label is "PROPERTY OF ANNALS OF THE HISTORY OF COMPUTING 133 McBryde Hall Virginia Tech Blacksburg, VA 24061-0119". Stamped on verso side in purple ink is "MUSEO ARQUEOLOGICAL NACIONAL MADRID" and "Inventario n. Negativo n. Fecha PROHIBIDA LA PUBLICACION SIN AUTORIZACION ESCRITA En publicacion autorizada citese foto MUSEO ARQUEOLOGICO NACIONAL". Written in red ink next to "Inventario n." is "...2698". Written in red ink next to "Negativo n." is "3846/8". Written in red ink next to the "Fecha" is 27-9-85". Also stamped in purple ink is "PROHIBIDA LA PUBLICACION NO AUTORIZADA".
