Photography Pictures: Abacus



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abacus - created by lincemiope


abacus
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http://en.wikipedia.org/wiki/Abacus (5 years and 2546 days ago)

avatar MarcosSanchez

Oh! Now you're back in time ...

author says:

not believe.
I miss from China for 10 years, but all used the 'schedule, and I had also learned how to make simple calculations
the binary system is very convenient, and is the basis of computing
thnak for the comment

(5 years and 2545 days ago)


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