- USTC - Abacus
ABACUS (Atomic-orbital Based Ab-initio Computation at USTC) is an open-source software package designed for large-scale electronic structure simulations from first principles
- ABACUS 中文文档主页
本教程系列旨在帮助新手用户入门了解 ABACUS 的使用。 秉着开源软件的理念，本文档是由开源社区的老师同学们贡献所成。
- 算盘 - 维基百科，自由的百科全书
在公元前2400年的 巴比伦 就可能有算盘，在公元前五世纪 希腊 的 希罗多德 有纪录 埃及 人有使用，后来其 希腊字 ἄβᾰκος 成为 拉丁文 、英文的 abacus 。
- ABACUS中文 (简体)翻译：剑桥词典 - Cambridge Dictionary
Machines for calculating fixed numerical tasks such as the abacus have existed since antiquity, aiding in computations such as multiplication and division
- Abacus | Definition, History, Origin, Facts | Britannica
Abacus, calculating device, probably of Babylonian origin, that was long important in commerce It is the ancestor of the modern calculating machine and computer The abacus was in universal use in Europe in the Middle Ages, as well as in the Arab world and in Asia
- 算盘_百度百科
算盘 ( Abacus)是一种手动操作计算辅助工具形式。 它起源于中国，是中国古代的一项重要发明。 在阿拉伯数字出现前，算盘是世界广为使用的计算工具。
- Amazon. com: Abacus
Abacus，Soroban, Abacus for Adults, Professional 13 Column Abacus for Math with Reset Button，Digits and Educational Learning Tool （9 8 inch） Add to cart
- Abacus Explained — Everything You Need To Know - History Tools
The abacus is one of the oldest calculating devices, used by ancient civilizations globally This comprehensive guide will explain what an abacus is, how it works, its fascinating history, why it remains popular today, and how learning abacus calculation can improve your math skills!
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