Copyright is defined as the exclusive right to publish, sell or otherwise deal with the written question whether it is a book that contains any material. The Copyright Act of 1976 protects all writing by January 1, 1978 for the lifetime of the author plus seventy years. If there are two or more works of the copyright lasts for 70 years after the death of the last author. Anonymous publications are however different. They last for 95 years from the date of publication or 120 years from the day to write whichever is shorter.

What works for pre provider to January 1, 1978 were originally copyrighted in 28 years with a renewal of that term only. The Copyright Act extended the renewal period to 47 years total time of 75 years. Public Law Number 105-298, which was signed on October 27, 1998 be extended to 67 years, for a total of 95 years.

supply any job in the public domain where it is freely accessible from the outside world can not be copyrighted as it is accessible to anyone. Thus it is able freely copied and distributed by anyone. If the work is protected by copyright, it is represented by a small c in a circle or copyrights words written under it.

The practice of requiring notice to be published to remind people of copyright is not required by law as amended March 1, 1989 of the Berne Convention. United States and other countries agreed to follow her instructions. However works written before the date required written notice, or that they were considered in the public domain. If the notification is still used after the date on which it is useful to the author as it identifies his or her name, date of publishing and writing, and helps the judicial authorities matters relating to work.

Copyright Law protects the intellectual property of individuals or group of individuals from unscrupulous people who would try and benefit from the work and expertise of others.