内容简介：The first calculatorsSimultaneously with the abacuses, still during the pre-revolutionary years (1917), the logarithmic (slide) rulers were used in scientific circles, practically without change, since the XVII century. They were in service "serve smb. f
The first calculators
The first mechanical device used in Russia for computational purposes was theRussian abacus (schoty). This device became "the national calculator" and was used in cashier's offices down to the middle of the 90's. It is interesting to note that the textbook "Trade calculations" published in 1986 devotes a whole chapter to methods of calculation by using abacuses.
Simultaneously with the abacuses, still during the pre-revolutionary years (1917), the logarithmic (slide) rulers were used in scientific circles, practically without change, since the XVII century. They were in service "serve smb. faithfully" up to the appearance of calculators.
In an effort to automate the processing of calculations, the mankind begins to invent mechanical calculating devices. It is known that the Russian mathematician Chebyshev designed a calculator at the end of the XIX century, unfortunately the drawings were lost.
以上所述就是小编给大家介绍的《Soviet Calculators History》，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持！
猜你喜欢:
本站部分资源来源于网络，本站转载出于传递更多信息之目的，版权归原作者或者来源机构所有，如转载稿涉及版权问题，请联系我们。
Programming Ruby中文版
托马斯 / 孙勇、姚延栋、张海峰 / 电子工业出版社 / 2007-3 / 99.00元
《Programming Rudy》(中文版)(第2版)是它的第2版，其中包括超过200页的新内容，以及对原有内容的修订，涵盖了Ruby 1．8中新的和改进的特性以及标准库模块。它不仅是您学习Ruby语言及其丰富特性的一本优秀教程，也可以作为日常编程时类和模块的参考手册。Ruby是一种跨平台、面向对象的动态类型编程语言。Ruby体现了表达的一致性和简单性，它不仅是一门编程语言，更是表达想法的一种简......一起来看看 《Programming Ruby中文版》 这本书的介绍吧!
