As someone who actually used APL prifessionally for a decade I am always surprised by how often the language surfaces on HN. I used it in a wide range of domai

As someone who actually used APL prifessionally for a decade I am always surprised by how often the language surfaces on HN. I used it in a wide range of domains, from business and engineering applications to DNA sequencing. The main comment I want to make is that anything that abandons notation is an abomination. The power of APL comes from the use if notation as a tool for thought and the expression if ideas. Notation is crucially important in this regard. Language transliterations like J were huge mistakes in APL’s historical timeline.