The second edition, circulated in-house, was distributed in June 1988. Notwithstanding its having been reviewed by both the legal and accounting departments beforehand, it was promptly stamped ``Confidential'' and made subject to a sign-out procedure. Stripped of trivial information, such as AutoCAD unit sales numbers and profit and loss by subsidiary (by then well out of date), it became the raw material for the edition published by New Riders.