I do not think this can be determined as it is so ancient and there are so many types, each likely independently invented.
An Abacus has beads and strings.
pheonix wright
ABACUS is a name of a calculating apparatus - it is not an acronym.
If you are refering to Chinese abacus their earliest rudimentary design of abacus has 1/4 rod beads (quite similar to the later Japanese soroban abacus). Various other types of abacus design were also seen afterwards, but the advance type of 2/5 rod beads became standard and classic. Afterwards, the basic 1/5 rod beads particularly became the type of basic design. The Roman abacus may be not connected to the Chinese abacus.
abacus the Chinese invented it
Abacus was invented by the Chinesethe abacus was also known as the first computer
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.
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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
During the Achaemenid Persian Empire, around 600 BC the Persians first began to use the abacus but I don't think history has documented it's inventor-someone will correct me or add if I am wrong..
The abacus was not invented by a Filipino; it was first recorded, well before that area was even properly settled, in many ancient civilisations earlier than 500 BCE, and in Mesopotamia before 2000 BCE. The abacus was likely introduced to the country by traders some time after the 13th century.
Unknown, it was before written history. however lee kai chen invented an improved version with decimal points.
I think what you are asking is an abacus. Some people say that the Abacus was invented before any other counting device so many thousands or years ago that the inventor is not known
China invented the abacus .
How did the abacus occur?
The Chinese abacus