There was a time where a program that produced output like here, much worse than TeX of course, but very fast on the PC computers of that time, and easy to lear

There was a time where a program that produced output like here, much worse than TeX of course, but very fast on the PC computers of that time, and easy to learn, was very popular for scientific writing with formulas: https://nomdo.nl/cw.htm https://nomdo.nl/cw.htm https://en.wikipedia.org/wiki/ChiWriter https://en.wikipedia.org/wiki/ChiWriter