ISBN Tools
- http://isbntools.com/
- Information and tools for using International Standard Book Numbers. Scan them with a CueCat, look them up, or search them.
ISBN.org
- http://www.isbn.org/
- Enables applications to be made for ISBNs, SANs, and ISMNs in the United States and Puerto Rico, and provides information about the standards.
The User Manual Site
- http://www.theusermanualsite.com/
- Contains instruction manuals and other support documents including operator and user guides, and how-to information for all sorts of appliances, machines and devices.