S1·E11 – Abacus
2008-06-23 • 28 min
The "soroban" (Abacus) - a calculation tool no longer used in the Western world but still a common sight in Japan, where education and businesses use it with great succes.
2008-06-23 • 28 min
The "soroban" (Abacus) - a calculation tool no longer used in the Western world but still a common sight in Japan, where education and businesses use it with great succes.
