If it intrigues you, check out Henry Rich's _J for C Programmers_. There's a free PDF on Lulu, and it's included with J (http://www.jsoftware.com/ http://www.js

If it intrigues you, check out Henry Rich's _J for C Programmers_. There's a free PDF on Lulu, and it's included with J (http://www.jsoftware.com/ http://www.jsoftware.com/). Like Emacs, J's internal documentation is excellent, but you have to learn its idiosyncratic terminology before you can actually find things.