U.S. Copyright Office
http://lcweb.loc.gov/copyright/
Copyright basics, law, federal regulations, procedures, records, forms.... Public service information to help you understand copyrights.

U.S. Patent and Trademark Office
http://www.uspto.gov
Patents, trademarks, download forms, PTO Fees, legal materials, statistics, acquisitions....Public service information to help you understand patents and trademarks.

Domain Name Registration http://www.rs.internic.net
The procedures to follow pertaining to getting, modifying, changing and updating a domain name.