Slide Rule (B Kwok)
- Admin
- 2019年1月4日
- 讀畢需時 1 分鐘

It was a present from my tutor when I was in primary school. I'd never heard abot the term "calculator" at that time. Electronic calculators became essentail few years later.
It was a present from my tutor when I was in primary school. I'd never heard abot the term "calculator" at that time. Electronic calculators became essentail few years later.
Comments