Might be of interest to some. Engineer On A Disk [.pdf] http://claymore.engineer.gvsu.edu/eod/ Topics include circuits, materials, computer programming and hardware, mechanical device design, mechatronics, quality control, manufacturing processes, and general reference. Each section is huge, with many items that are discussed in detail. Cheers, Ling SM -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body