dosai.com is the world's first tamil search engine established soon after unicode consortium's standards for tamil character set.

The onscreen keyboard layout, html, javascript, php codes that run the search are copyrighted in US. Enclosed image below shows the US copyright license obtained from US Government. Any violation of this copyright will be summarily dealt with under the bluesky laws with penalties ranging from monetary fines to imprisonment (for repeat offenses). All countries that are signatories to World Intellectual Property Organization are subject to the international laws on copyrights.

Websites that were nuked for violating this copyright through plagiarism, removed from google and other top search engines and reported at chilling effects are

www.thamil.com (banned by google)
www.tamilsearch.co.uk (under prosecution)

Copyright License from US copyright.gov: