This is the old J wiki, which is now read only.
The new wiki is at code.jsoftware.com as from 20 September 2015.
Welcome to the Jsoftware wiki. See About for an overview of the wiki and how to edit the pages.
Showcase - Showcase of J in action
Guides - FAQs, How-tos, etc.
Library - J code library
System - System documentation, feature requests, etc.
Community - J User Community
Home Page: www.jsoftware.com