Close up of a slide rule

---

Close-up of a slide rule

---

Size: 2848px × 4287px
Photo credit: © Thom Gourley/Flatbread Images, LLC / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: anachronism, analysis, archaic, calculate, calculation, classic, engineering, estimation, indicator, logarithm, logarithmic, math, mathematics, maths, outdated, physics, pi, quantitative, rule, scale, science, scientific, slide, technology, trigonometry