Roger Hui's 'An Implementation of J', published in 1992, is fascinating for anyone interested in J (particularly the innards of J). After 22 years, it remains as remarkable and timeless as the first edition of the Dictonary.
A complete copy is now available at: http://www.jsoftware.com/books/pdf/aioj.pdf It is images, so isn't quite as nice as if we went the extra OCR step, but works well. There are a few extra/missing blank pages, but it is all there. It is still relevant for anyone interested in understanding the J source. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
