// todo need optimize like in event.jsp. Add indexing or not indexing this page. Multiplication tables (7h 50min, nov 18, 2018 y – 20h 53min, jul 30, 2019 y) (Timeline)
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Multiplication tables (7h 50min, nov 18, 2018 y – 20h 53min, jul 30, 2019 y)

Description:

Until the 1960s, complicated computations were done with the help of mathematical tables.

Added to timeline:

Counting/Caculating Inventions

ByEmily Stark
4 Nov 2019

Date:

7h 50min, nov 18, 2018 y
20h 53min, jul 30, 2019 y
~ 8 months
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