====== Flowcharts ======

  * https://www.outsystems.com/glossary/what-is-visual-programming/
  * https://en.wikipedia.org/wiki/Flow_process_chart
  * https://www.thegilbreths.com/resources/Gilbreth-Process-Charts-1921.pdf
  * https://mosaicprojects.com.au/PDF-Gen/Process_Charts_Gilbreth.pdf
  * https://ssmancha.medium.com/a-century-of-flowcharts-f425d38fef72