Abacus was invented by the Chinese
the abacus was also known as the first computer
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The abacus has been around for millennia, in various countries. No record of the inventor was made.
The Abacus is ancient and the inventor of the original is unknown. Lee Kai Chen did however invent an improved abacus with a movable decimal point and two auxiliary fields for use in complex operations. This abacus was named after himself.
If he isn't the inventor, that probably means that somebody else invented it. Look it up on Wikipedia - it seems that the abacus was already used thousands of years ago.d
Unknown, it was before written history. however lee kai chen invented an improved version with decimal points.
The full name of an abacus is an abacus. It is a calculating tool. people also refer to them as counting frames.