I purchased my first mechanical analog computer in 1962, when I was an electrical engineering freshman at the University of Illinois. It was distributed by The Fredrick Post Company of Chicago, but manufactured by The Hemmi Bamboo Slide Rule Company Ltd. in Japan. The model I obtained was the Versalog 1460 slide rule (slipstick) with the cordovan color leather case (Figure 1). This was the essential basic engineering tool for all mathematical computations required by students in the electrical engineering program at the university. Using the slide rule effectively required applying the fundamental rules of use coupled with one's intuitive engineering skills. You had to figure out where the place value of the decimal point was in your answer since the slide rule didn't keep track of this. Your intuition helped to quickly solve this issue.

中文翻译：

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体验技术演进【历史沿革】

我在 1962 年购买了我的第一台机械模拟计算机，当时我还是伊利诺伊大学电气工程专业的新生。它由芝加哥的 Fredrick Post Company 发行，但由日本的 The Hemmi Bamboo Slide Rule Company Ltd. 制造。我得到的模型是 Versalog 1460 计算尺（滑尺）和马臀色皮套（图 1）。这是大学电气工程专业学生所需的所有数学计算必不可少的基本工程工具。有效地使用计算尺需要应用基本的使用规则以及直观的工程技能。你必须弄清楚小数点的位置值在你的答案中的位置，因为计算尺没有跟踪这个。你的直觉帮助快速解决了这个问题。