abacus

n.

算盘；（圆柱）顶板；

复数：abacuses

1. The abacus is the ancestor of the modern computer.
   算盘是现代电脑的原型。
2. Can you use an abacus, Mr. Cooper?
   库珀先生，请问你会用算盘吗？

The Molecular Abacus:  STM Manipulation of Cyclodextrin Necklace
Digit memory of grand experts in abacus-derived mental calculation
Superior digit memory of abacus experts: an event-related functional MRI study
“Mental abacus”: The effect of abacus training on Chinese children's mental calculation ☆
The ABACUS system for branch-and-cut-and-price algorithms in integer programming and combinatorial optimization
Integrating Quantitative and Qualitative Discovery: The ABACUS System
Introduction to ABACUS - a branch-and-cut system11Partially supported by ESPRIT LTR Project no. 20244 - ALCOM-IT.
6 – INTEGRATING QUANTITATIVE AND QUALITATIVE DISCOVERY IN THE ABACUS SYSTEM
Neural correlates underlying mental calculation in abacus experts: a functional magnetic resonance imaging study.
Haniffa, R. & Cooke, T.E. (2002) Culture, Corporate Governance and Disclosure in Malaysian Corporations, Abacus Vol. 38 Issue 3, p.3...