units of 1 and units of five
chinese are white and japanese are short
An abacus is an ancient mathematical tool invented by the Japanese.
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.
The Japanese invented the logarithmns. Thats what was next.
The upper part of an abacus consists of one bead each that has the value of 'five'. The lower part of an abacus consists of four beads and each of them has value 'one'. All the beads in one grid together add up to the value 'nine'.
Plural of abacus: abaci or abacuses.
An abacus is not a computer system as zero parts of the abacus are electrical. For the abacus to be a computer system, it has to have an input, output and process and store data. If even one of the following is not true then the device will not be considered a computer system. An abacus can not store data, as the human using the abacus will have to memorise the sequences instead of the abacus being able to memorise on its own.
The ancient Chinese also had their own abacus device for calculating purposes
wood parrelel rod and beads
The abacus, also called a counting frame, is a calculating tool used primarily in parts of Asia for performing arithmetic processes
An abacus is a calculating tool used primarily in parts of Asia for arithmetic. The abacus was in use centuries before the written modern numeral system and is still used by merchants, traders and clerks in Asia and Africa.