Question

which was first calculator​

Answer 1

Abacus

Explanation:

The earliest known calculating device is probably the abacus

Answer 2

Answer:

The first solid-state electronic calculator was created in the early 1960s. Pocket-sized devices became available in the 1970s, especially after the Intel 4004, the first microprocessor, was developed by Intel for the Japanese calculator company Busicom.

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