Measurement, Mathematics and Science
- International System of Units (Système international d'unités), the modern international standard version of the metric system
- Signal integrity, electronic circuit tools and techniques that ensure electrical signals are of sufficient quality for proper operation
- Si, the chemical symbol for silicon
- Si(x), the sine integral in mathematics
- Survey of India, an Indian government agency responsible for managing geographical information about India
- Simple Interest (Mathematics)
Read more about this topic: Si
Famous quotes containing the words mathematics and/or science:
“Why does man freeze to death trying to reach the North Pole? Why does man drive himself to suffer the steam and heat of the Amazon? Why does he stagger his mind with the mathematics of the sky? Once the question mark has arisen in the human brain the answer must be found, if it takes a hundred years. A thousand years.”
—Walter Reisch (1903–1963)
“I exulted like “a pagan suckled in a creed” that had never been worn at all, but was brand-new, and adequate to the occasion. I let science slide, and rejoiced in that light as if it had been a fellow creature. I saw that it was excellent, and was very glad to know that it was so cheap. A scientific explanation, as it is called, would have been altogether out of place there. That is for pale daylight.”
—Henry David Thoreau (1817–1862)