Engineer On A Disk is a great resource for any undergraduate engineering student studying for a fundamentals exam. The material covered on the site spans nearly every engineering discipline and is maintained by a professor at Grand Valley State University. 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. The HTML version of Engineer On A Disk is quite difficult to navigate; however, the Adobe Acrobat (.pdf) version is much better.