Weekend miscellany


The wonderful world of early computing
How to design programs


Twitter accounts for all StackOverflow users by reputation and area
One fact per day from computer science, math, statistics, etc.


Elementary mechanics from a mathematician’s viewpoint
Using ultrasound to study dying languages


Spherical trigonometry textbook from 1886, typeset in LaTeX
Real Roman numerals
Ulam spiral

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2 comments on “Weekend miscellany
  1. Nick says:

    Fascinating links as ever.
    The Roman numerals article led me to something I found particularly interesting: the use of IIII on clocks instead of IV to reduce the number of molds required to just one, see http://en.wikipedia.org/wiki/IIII#Calendars_and_clocks

  2. John says:

    Thanks. I hadn’t heard the practical explanation for IIII on clocks.

    I liked the line in the article “There are many suggested explanations for this, several of which may be true.”

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