Appliances 411 A gateway to information at manufacturer's sites, mostly for large appliances. Some manuals may be downloaded for free!
DVD Demystified Based on Jim Taylor's books by this title, this site is a good resource for figuring out how that DVD works, and what to do when it doesn't. Click on DVD FAQ.
Frequency and wavelength - ever wonder how this works? Here is a calculator to help you. Or, here is a site with a calculator as well as more information on radio frequency. And if you would like an interactive demonstration of wavelength and frequency, try here.
VCR Repair Instruction This is an "online manual" on VCR repair, with some model-specific information.