This is the complete Z88 User Guide, original 4th edition, in wiki format, edited with updated screen-shots and graphics. This work started when Per Svensson a long time ago meticiously scanned and organized 1/3 of sections to html and the rest in text files and images. We have now completed the entire book in wiki-format. If you find errors in the text, feel welcome to comment on the page you found what needs improving. (14th Nov 2012)