Despite the gigantic strides made in electronics and software, the Slide Rule remains a masterpiece of engineering, a timeless showcase of the power of the human mind.
The photo shows the Staedtler-Mars model which I bought in 1976, when I enrolled into the Engineering Faculty, University of Malaya. Wow, it was a new tool that I never knew before, with awesome mathematical computation capabilities like logarithms, geometric functions, squares, square roots, etc (I have forgotten most of them).
My biggest headache seemed to be finding the right set of figures for square roots (which was essential in tackling AC electricity questions), and under the tense atmosphere of a time-constrained examinations hall, it was a real odyssey of epic intensity.
So much so that at one point, my slide rule fell to the floor and cracked. (see the top left corner).