S1E11
Abacus
23 Haziran 2008
28 dk
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.
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.