what is the abbreviation of abacus
The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool that was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants, traders and clerks in Asia, Africa, and elsewhere.he earliest known written documentation of the Chinese abacus dates to the 2nd century BC. The Chinese abacus, known as the suanpan (ç®ç¤, lit. Counting tray, Mandarin suan suÃ n, Pan pÃ¡n cantonese), syun3 pun4 is typically (20 cm) 8 in tall and comes in various widths depending on. the operator