18
/
en
AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
104739
9500
2

dec 31, 1965 - Also late 1965 - The ELKA 6521 designed by Bulgaria is produced; it is the first calculator with a square root function.

Added to timeline:

4 Oct 2017
0
0
173
Calculator history

Date:

dec 31, 1965
Now
~ 52 years ago
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