Iverson&#x27;s later language, J, is also open source. It doesn&#x27;t require a special keyboard, has top notch documentation and online support resources and is open source under GPL3. It might or might not be a better place to get started than APL depending on a person&#x27;s goals.<p><a href="http:&#x2F;&#x2F;www.jsoftware.com&#x2F;stable.htm" rel="nofollow">http:&#x2F;&#x2F;www.jsoftware.com&#x2F;stable.htm</a>