Fred, The process of resolving misconceptions and comprehending an intended meaning is part of learning. So I view this matter of "other O" as helping me to understand the equaliser. Yes, Wikipedia has careless editing and that is one of the motivations for building the Citizendium. [http://en.citizendium.org/] It has careless editing also; hopefully not so prevalent as in the Wikipedia. Even with the limitations, the Wikipedia and the Citizendium have helped me. For publishing with immunity to outside interference, nothing is better than a personal Web page. Thanks for the responses, ... Peter E. -- Telephone 1 360 450 2132. bcc: peasthope at shaw.ca Shop pages http://carnot.yi.org/ accessible as long as the old drives survive. Personal pages http://members.shaw.ca/peasthope/ . [For admin and other information see: http://www.mta.ca/~cat-dist/ ]